There is a document explaining things in the mod file. What do you need more?
http://www.subsim.com/radioroom/down...o=file&id=3675
And the solution to your problem is easy. Use JSGME! If you have other mods than you may need to edit the menu_1024_768.ini file anyway. Just take a copy of what is in your game now, edit that, and plug it back into the right place in the MODS folder. Then enable. And disable when something is edited wrong. There should be no game corruptions this way. 'Easy undo' is the trademark of JSGME!