diff --git a/sys/apis/injector.lua b/sys/apis/injector.lua
index e944775..66762ad 100644
--- a/sys/apis/injector.lua
+++ b/sys/apis/injector.lua
@@ -1,6 +1,7 @@
-local DEFAULT_UPATH = 'https://raw.githubusercontent.com/kepler155c/opus/' .. _ENV.BRANCH .. '/sys/apis'
 local PASTEBIN_URL  = 'http://pastebin.com/raw'
 local GIT_URL       = 'https://raw.githubusercontent.com'
+local DEFAULT_PATH  = 'sys/apis'
+local DEFAULT_UPATH = GIT_URL .. '/kepler155c/opus/' .. _ENV.BRANCH .. '/sys/apis'
 
 local fs   = _G.fs
 local http = _G.http
@@ -128,8 +129,8 @@ local function requireWrapper(env)
 
   -- place package and require function into env
   env.package = {
-    path = env.LUA_PATH or 'sys/apis',
-    upath = env.LUA_UPATH or DEFAULT_UPATH,
+    path   = env.LUA_PATH  or os.getenv('LUA_PATH')  or DEFAULT_PATH,
+    upath  = env.LUA_UPATH or os.getenv('LUA_UPATH') or DEFAULT_UPATH,
     config = '/\n:\n?\n!\n-',
     loaded = {
       math   = math,
diff --git a/sys/apps/Files.lua b/sys/apps/Files.lua
index 53045b6..5675925 100644
--- a/sys/apps/Files.lua
+++ b/sys/apps/Files.lua
@@ -1,4 +1,4 @@
-_G.requireInjector()
+_G.requireInjector(_ENV)
 
 local Config = require('config')
 local Event  = require('event')
diff --git a/sys/apps/Lua.lua b/sys/apps/Lua.lua
index 983bd16..41b6867 100644
--- a/sys/apps/Lua.lua
+++ b/sys/apps/Lua.lua
@@ -1,5 +1,4 @@
-local injector = _G.requireInjector or load(_G.http.get('https://raw.githubusercontent.com/kepler155c/opus/master/sys/apis/injector.lua').readAll())()
-injector()
+_G.requireInjector(_ENV)
 
 local Event      = require('event')
 local History    = require('history')
@@ -13,7 +12,7 @@ local textutils  = _G.textutils
 local sandboxEnv = setmetatable(Util.shallowCopy(_ENV), { __index = _G })
 sandboxEnv.exit = function() Event.exitPullEvents() end
 sandboxEnv._echo = function( ... ) return { ... } end
-injector(sandboxEnv)
+_G.requireInjector(sandboxEnv)
 
 UI:configure('Lua', ...)
 
diff --git a/sys/apps/Network.lua b/sys/apps/Network.lua
index d8831ab..ca3e44d 100644
--- a/sys/apps/Network.lua
+++ b/sys/apps/Network.lua
@@ -1,4 +1,4 @@
-_G.requireInjector()
+_G.requireInjector(_ENV)
 
 local Event  = require('event')
 local Socket = require('socket')
diff --git a/sys/apps/Overview.lua b/sys/apps/Overview.lua
index ec22405..704fa09 100644
--- a/sys/apps/Overview.lua
+++ b/sys/apps/Overview.lua
@@ -10,12 +10,17 @@ local Tween  = require('ui.tween')
 local UI     = require('ui')
 local Util   = require('util')
 
+local colors     = _G.colors
 local fs         = _G.fs
-local multishell = _ENV.multishell or error('This program requires multishell')
 local pocket     = _G.pocket
+local shell      = _ENV.shell
 local term       = _G.term
 local turtle     = _G.turtle
 
+if not _ENV.multishell then
+  error('multishell is required')
+end
+
 local REGISTRY_DIR = 'usr/.registry'
 
 UI:configure('Overview', ...)
@@ -350,32 +355,16 @@ function page:eventHandler(event)
       table.remove(config.Recent, maxRecent + 1)
     end
     Config.update('Overview', config)
-    multishell.openTab({
-      title = event.button.app.title,
-      path = 'sys/apps/shell',
-      args = { event.button.app.run },
-      focused = true,
-    })
+    shell.switchTab(shell.openTab(event.button.app.run))
 
   elseif event.type == 'shell' then
-    multishell.openTab({
-      path = 'sys/apps/shell',
-      focused = true,
-    })
+    shell.switchTab(shell.openTab('sys/apps/shell'))
 
   elseif event.type == 'lua' then
-    multishell.openTab({
-      path ='sys/apps/shell',
-      args = { 'sys/apps/Lua.lua' },
-      focused = true,
-    })
+    shell.switchTab(shell.openTab('sys/apps/Lua.lua'))
 
   elseif event.type == 'files' then
-    multishell.openTab({
-      path ='sys/apps/shell',
-      args = { 'sys/apps/Files.lua' },
-      focused = true,
-    })
+    shell.switchTab(shell.openTab('sys/apps/Files.lua'))
 
   elseif event.type == 'focus_change' then
     if event.focused.parent.UIElement == 'Icon' then
diff --git a/sys/apps/Tasks.lua b/sys/apps/Tasks.lua
index b77b836..d375832 100644
--- a/sys/apps/Tasks.lua
+++ b/sys/apps/Tasks.lua
@@ -1,4 +1,4 @@
-_G.requireInjector()
+_G.requireInjector(_ENV)
 
 local Event = require('event')
 local UI    = require('ui')
diff --git a/sys/apps/shell b/sys/apps/shell
index 41b95f1..84a2795 100644
--- a/sys/apps/shell
+++ b/sys/apps/shell
@@ -304,7 +304,7 @@ function shell.newTab(tabInfo, ...)
 
   if path then
     tabInfo.path = path
-    tabInfo.env = sandboxEnv
+    tabInfo.env = Util.shallowCopy(sandboxEnv)
     tabInfo.args = args
     tabInfo.title = fs.getName(path):match('([^%.]+)')
 
@@ -319,7 +319,18 @@ end
 
 function shell.openTab( ... )
   -- needs to use multishell.launch .. so we can run with stock multishell
-  return shell.newTab({ }, ...)
+  local tWords = tokenise( ... )
+  local sCommand = tWords[1]
+  if sCommand then
+    local sPath = shell.resolveProgram(sCommand)
+    if sPath == "sys/apps/shell" then
+      return _ENV.multishell.launch(Util.shallowCopy(sandboxEnv), sPath, table.unpack(tWords, 2))
+    elseif sPath ~= nil then
+      return _ENV.multishell.launch(Util.shallowCopy(sandboxEnv), "sys/apps/shell", sCommand, table.unpack(tWords, 2))
+    else
+      _G.printError( "No such program" )
+    end
+  end
 end
 
 function shell.openForegroundTab( ... )
diff --git a/sys/autorun/clipboard.lua b/sys/autorun/clipboard.lua
index cec3f55..204b699 100644
--- a/sys/autorun/clipboard.lua
+++ b/sys/autorun/clipboard.lua
@@ -1,9 +1,10 @@
-_G.requireInjector()
+_G.requireInjector(_ENV)
 
 local Util = require('util')
 
 local kernel    = _G.kernel
 local keyboard  = _G.device.keyboard
+local os        = _G.os
 local textutils = _G.textutils
 
 local data
@@ -12,11 +13,14 @@ kernel.hook('clipboard_copy', function(_, args)
   data = args[1]
 end)
 
-keyboard.addHotkey('shift-paste', function(_, args)
+keyboard.addHotkey('control-shift-paste', function(_, args)
   if type(data) == 'table' then
     local s, m = pcall(textutils.serialize, data)
     data = (s and m) or Util.tostring(data)
   end
   -- replace the event paste data with our internal data
   args[1] = Util.tostring(data or '')
+  if data then
+	  os.queueEvent('paste', data)
+	end
 end)
diff --git a/sys/services/gpshost.lua b/sys/autorun/gpshost.lua
similarity index 100%
rename from sys/services/gpshost.lua
rename to sys/autorun/gpshost.lua
diff --git a/sys/services/log.lua b/sys/autorun/log.lua
similarity index 91%
rename from sys/services/log.lua
rename to sys/autorun/log.lua
index 40b24b0..75b3016 100644
--- a/sys/services/log.lua
+++ b/sys/autorun/log.lua
@@ -10,20 +10,19 @@ local multishell = _ENV.multishell
 local os         = _G.os
 local term       = _G.term
 
+local routine = kernel.getCurrent()
 if multishell then
   multishell.setTitle(multishell.getCurrent(), 'System Log')
+  multishell.hideTab(routine.uid)
 end
 
 local w, h = kernel.window.getSize()
 kernel.window.reposition(1, 2, w, h - 1)
 
-local routine = kernel.getCurrent()
 routine.terminal = kernel.window
 routine.window = kernel.window
 term.redirect(kernel.window)
 
-local previousId
-
 kernel.hook('mouse_scroll', function(_, eventData)
   local dir, y = eventData[1], eventData[3]
 
@@ -42,10 +41,9 @@ end)
 keyboard.addHotkey('control-d', function()
   local current = kernel.getFocused()
   if current.uid ~= routine.uid then
-    previousId = current.uid
     kernel.raise(routine.uid)
-  elseif previousId then
-    kernel.raise(previousId)
+  elseif kernel.routines[2] then
+    kernel.raise(kernel.routines[2].uid)
   end
 end)
 
diff --git a/sys/boot/opus.boot b/sys/boot/opus.boot
index 6250651..ed0ca41 100644
--- a/sys/boot/opus.boot
+++ b/sys/boot/opus.boot
@@ -1,6 +1,7 @@
 -- Loads the Opus environment regardless if the file system is local or not
 local fs     = _G.fs
 local http   = _G.http
+local os     = _G.os
 
 local BRANCH   = 'develop-1.8'
 local GIT_REPO = 'kepler155c/opus/' .. BRANCH
@@ -44,6 +45,14 @@ local function runUrl(file, ...)
   error('Failed to download ' .. url)
 end
 
+function os.getenv(varname)
+  return sandboxEnv[varname]
+end
+
+function os.setenv(varname, value)
+  sandboxEnv[varname] = value
+end
+
 -- Install require shim
 if fs.exists('sys/apis/injector.lua') then
   _G.requireInjector = run('sys/apis/injector.lua')
diff --git a/sys/etc/app.db b/sys/etc/app.db
index c1b86b2..d03035a 100644
--- a/sys/etc/app.db
+++ b/sys/etc/app.db
@@ -15,14 +15,6 @@
  \0308\031f.\030 \031  \0308\031f.\030 \031   ",
     run = "Turtles.lua",
   },
-  [ "81c0d915fa6d82fd30661c5e66e204cea52bb2b5" ] = {
-    title = "Activity",
-    category = "Apps",
-    icon = "\0318/\030f\031  \030 \0318\\\
-\030f \0308\0319o\030f\031  \
-\0318\\\030f\031  \030 \0318/",
-    run = "storageActivity.lua",
-  },
   [ "9f46ca3ef617166776ef6014a58d4e66859caa62" ] = {
     title = "DJ",
     category = "Games",
@@ -114,6 +106,15 @@
 \030f     ",
     run = "sys/apps/Lua.lua",
   },
+--[[
+  [ "81c0d915fa6d82fd30661c5e66e204cea52bb2b5" ] = {
+    title = "Activity",
+    category = "Apps",
+    icon = "\0318/\030f\031  \030 \0318\\\
+\030f \0308\0319o\030f\031  \
+\0318\\\030f\031  \030 \0318/",
+    run = "storageActivity.lua",
+  },
   [ "89307d419a2fe4fbb69af92b3d3af27b6ec14d3e" ] = {
     title = "Telnet",
     category = "Apps",
@@ -122,6 +123,24 @@
 \0314>\0310_\031     ",
     run = "telnet.lua",
   },
+  [ "8a77613b475e46064321fd7da18d126ee35e5066" ] = {
+    title = "VNC",
+    category = "Apps",
+    icon = "\
+\031e\\\031   \031e/\031dn\
+ \031e\\/\031  \0319c",
+    run = "vnc.lua",
+  },
+  [ "8d59207c8a84153b3e9f035cc3b6ec7a23671323" ] = {
+    title = "Micropaint",
+    category = "Apps",
+  icon = "\030 \031f   \030f   \
+\030 \031f^ \0300   \030f \
+\030 \031fv \0300   \030  ",
+    run = "http://pastebin.com/raw/tMRzJXx2",
+    requires = "advancedComputer",
+  },
+--]]
   df485c871329671f46570634d63216761441bcd6 = {
     title = "Devices",
     category = "System",
@@ -180,14 +199,6 @@
 \030 \031b \030e    \030 \031f\\",
     run = "recorder.lua",
   },
-  [ "8a77613b475e46064321fd7da18d126ee35e5066" ] = {
-    title = "VNC",
-    category = "Apps",
-    icon = "\
-\031e\\\031   \031e/\031dn\
- \031e\\/\031  \0319c",
-    run = "vnc.lua",
-  },
   [ "6ce6c512ea433a7fc5c8841628e7696cd0ff7f2b" ] = {
     title = "Files",
     category = "Apps",
@@ -259,15 +270,6 @@
 \030 \031f   \0300   \0310 ",
     run = "https://gist.github.com/LDDestroier/c7528d95bc0103545c2a/raw",
   },
-  [ "8d59207c8a84153b3e9f035cc3b6ec7a23671323" ] = {
-    title = "Micropaint",
-    category = "Apps",
-  icon = "\030 \031f   \030f   \
-\030 \031f^ \0300   \030f \
-\030 \031fv \0300   \030  ",
-    run = "http://pastebin.com/raw/tMRzJXx2",
-    requires = "advancedComputer",
-  },
   [ "d78f28759f255a0db76604ee560b87c4715a0da5" ] = {
     title = "Sketch",
     category = "Apps",
diff --git a/sys/extensions/1.device.lua b/sys/extensions/1.device.lua
index e082b65..ed20c49 100644
--- a/sys/extensions/1.device.lua
+++ b/sys/extensions/1.device.lua
@@ -1,4 +1,4 @@
-_G.requireInjector()
+_G.requireInjector(_ENV)
 
 local Peripheral = require('peripheral')
 
diff --git a/sys/extensions/4.user.lua b/sys/extensions/4.user.lua
index 5676d29..41df8d3 100644
--- a/sys/extensions/4.user.lua
+++ b/sys/extensions/4.user.lua
@@ -3,6 +3,7 @@ _G.requireInjector()
 local Util = require('util')
 
 local fs    = _G.fs
+local os    = _G.os
 local shell = _ENV.shell
 
 if not fs.exists('usr/apps') then
@@ -12,7 +13,8 @@ if not fs.exists('usr/autorun') then
   fs.makeDir('usr/autorun')
 end
 if not fs.exists('usr/config/fstab') then
-  Util.writeFile('usr/config/fstab', 'usr gitfs kepler155c/opus-apps/' .. _ENV.BRANCH)
+  Util.writeFile('usr/config/fstab',
+    'usr gitfs kepler155c/opus-apps/' .. os.getenv('BRANCH'))
 end
 
 if not fs.exists('usr/config/shell') then
@@ -33,6 +35,6 @@ if config.aliases then
   end
 end
 shell.setPath(config.path)
-shell.setEnv('LUA_PATH', config.lua_path)
+os.setenv('LUA_PATH', config.lua_path)
 
 fs.loadTab('usr/config/fstab')
diff --git a/sys/extensions/7.multishell.lua b/sys/extensions/7.multishell.lua
index 4376cc3..f60a21d 100644
--- a/sys/extensions/7.multishell.lua
+++ b/sys/extensions/7.multishell.lua
@@ -13,7 +13,7 @@ local shell      = _ENV.shell
 local term       = _G.term
 local window     = _G.window
 
-local parentTerm = _G.device.terminal -- term.current()
+local parentTerm = _G.device.terminal
 local w,h = parentTerm.getSize()
 local overviewId
 local tabsDirty = false
diff --git a/sys/kernel.lua b/sys/kernel.lua
index 5f519cd..58b5818 100644
--- a/sys/kernel.lua
+++ b/sys/kernel.lua
@@ -1,4 +1,4 @@
-_G.requireInjector()
+_G.requireInjector(_ENV)
 
 local Terminal = require('terminal')
 local Util     = require('util')
@@ -137,8 +137,8 @@ function kernel.launch(routine)
       err = 'kernel: invalid routine'
     end
 
-    if not result and err and err ~= 'Terminated' then
-      error(err, 2)
+    if not result and err ~= 'Terminated' then
+      error(err or 'Error occurred', 2)
     end
   end)