James Monroe, Ld. programmer at Ravensoft today updated his .plan file with information about that they just released: Star Trek Voyager : Elite Force Single Player Game Source (expansion version). Here is a clip:

Much like the game SDK for Multiplayer, this SDK will allow you to modify the menus and game behavior of Elite Force Single Player.

• Since this SDK is only the game source, you will not be able to change any features of the executable, like rendering or map loading.
• The DLLs you build with this source should work with the Expansion Pack EF Exe.
• The single player executable was not designed to read DLLs from base folders for mods.
• You will have to put your modified DLLs in their own folders, along with the stvoy.exe and add the command line +set fs_basepath [original install folder]
• This has not been tested in any way, but I wanted to get the source out there as quickly as possible.