'hostlua' is going into the next round. rudi has made an easy to use package for Windows. This package includes an editor, a virtual camera environment for script tests, compiled hostlua with more than 300 CHDK Lua functions as emulated commands and of course chdkptp. You can also set your own camera preferences.
The benefits:
* portable (no installations), updateable
* oneclick configuration
* included one of the best editors (notepad++)
* syntax highlighting also for the CHDK Lua functions
* a virtual camera test environment for the buttons and the display
* direct script upload from the editor to the camera via chdkptp
More here:
http://chdk.wikia.com/wiki/Execute_Lua_scripts_with_hostlua_%26_notepad%2B%2Bmsl