diff --git a/sys/apps/Files.lua b/sys/apps/Files.lua
index f254a97..b39ddd9 100644
--- a/sys/apps/Files.lua
+++ b/sys/apps/Files.lua
@@ -1,3 +1,4 @@
+local Alt    = require('opus.alternate')
 local Config = require('opus.config')
 local Event  = require('opus.event')
 local pastebin = require('opus.http.pastebin')
@@ -353,7 +354,7 @@ function Browser:eventHandler(event)
 		self:setStatus('Started cloud edit')
 
 	elseif event.type == 'shell' then
-		self:run('sys/apps/shell.lua')
+		self:run(Alt.get('shell'))
 
 	elseif event.type == 'refresh' then
 		self:updateDirectory(self.dir)
diff --git a/sys/apps/Overview.lua b/sys/apps/Overview.lua
index 8cd2c92..92c09bf 100644
--- a/sys/apps/Overview.lua
+++ b/sys/apps/Overview.lua
@@ -1,3 +1,4 @@
+local Alt      = require('opus.alternate')
 local class    = require('opus.class')
 local Config   = require('opus.config')
 local Event    = require('opus.event')
@@ -420,13 +421,13 @@ function page:eventHandler(event)
 		shell.switchTab(shell.openTab(event.button.app.run))
 
 	elseif event.type == 'shell' then
-		shell.switchTab(shell.openTab('sys/apps/shell.lua'))
+		shell.switchTab(shell.openTab(Alt.get('shell')))
 
 	elseif event.type == 'lua' then
-		shell.switchTab(shell.openTab('sys/apps/Lua.lua'))
+		shell.switchTab(shell.openTab(Alt.get('lua')))
 
 	elseif event.type == 'files' then
-		shell.switchTab(shell.openTab('sys/apps/Files.lua'))
+		shell.switchTab(shell.openTab(Alt.get('files')))
 
 	elseif event.type == 'focus_change' then
 		if event.focused.parent.UIElement == 'Icon' then
diff --git a/sys/apps/network/telnet.lua b/sys/apps/network/telnet.lua
index 8bd11de..9aec83c 100644
--- a/sys/apps/network/telnet.lua
+++ b/sys/apps/network/telnet.lua
@@ -1,3 +1,4 @@
+local Alt    = require('opus.alternate')
 local Event  = require('opus.event')
 local Socket = require('opus.socket')
 local Util   = require('opus.util')
@@ -46,7 +47,7 @@ local function telnetHost(socket, mode)
 		title = mode .. ' client',
 		hidden = true,
 		co = coroutine.create(function()
-			Util.run(_ENV, 'sys/apps/shell.lua', table.unpack(termInfo.program))
+			Util.run(_ENV, Alt.get('shell'), table.unpack(termInfo.program))
 			if socket.queue then
 				socket:write(socket.queue)
 			end
diff --git a/sys/modules/opus/alternate.lua b/sys/modules/opus/alternate.lua
new file mode 100644
index 0000000..532fc20
--- /dev/null
+++ b/sys/modules/opus/alternate.lua
@@ -0,0 +1,52 @@
+local Config = require('opus.config')
+local Util   = require('opus.util')
+
+local function getConfig()
+    return Config.load('alternate', {
+        default = {
+            shell = 'sys/apps/shell.lua',
+            lua = 'sys/apps/Lua.lua',
+            files = 'sys/apps/Files.lua',
+        },
+        choices = {
+            shell = {
+                'sys/apps/shell.lua',
+                'rom/programs/shell',
+            },
+            lua = {
+                'sys/apps/Lua.lua',
+                'rom/programs/lua.lua',
+            },
+            files = {
+                'sys/apps/Files.lua',
+            }
+        }
+    })
+end
+
+local Alt = { }
+
+function Alt.get(key)
+    return getConfig().default[key]
+end
+
+function Alt.set(key, value)
+    local config = getConfig()
+
+    config.default[key] = value
+    Config.update('alternate', config)
+end
+
+function Alt.addChoice(key, value)
+    local config = getConfig()
+
+    if not config.choices[key] then
+        config.choices[key] = { }
+    end
+    if not Util.contains(config.choices[key], value) then
+        config.choices[key] = value
+        Config.update('alternate', config)
+    end
+end
+
+return Alt
diff --git a/sys/modules/opus/util.lua b/sys/modules/opus/util.lua
index 4604199..564b9f8 100644
--- a/sys/modules/opus/util.lua
+++ b/sys/modules/opus/util.lua
@@ -621,17 +621,17 @@ end
 
 -- http://snippets.luacode.org/?p=snippets/trim_whitespace_from_string_76
 function Util.trim(s)
-	return s:find'^%s*$' and '' or s:match'^%s*(.*%S)'
+	return s:find('^%s*$') and '' or s:match('^%s*(.*%S)')
 end
 
 -- trim whitespace from left end of string
 function Util.triml(s)
-	return s:match'^%s*(.*)'
+	return s:match('^%s*(.*)')
 end
 
 -- trim whitespace from right end of string
 function Util.trimr(s)
-	return s:find'^%s*$' and '' or s:match'^(.*%S)'
+	return s:find('^%s*$') and '' or s:match('^(.*%S)')
 end
 -- end http://snippets.luacode.org/?p=snippets/trim_whitespace_from_string_76