You have to be very careful when editing the .tgas if you use a modern graphics program like Photoshop or PSP you may end up changing the palette information and get funky mad colours in-game. To prevent this use a basic prog' like Gimp to open the file. Then copy/paste the section of the file you want to work on or replace into your favourite editor. When you are done, copy the section back into gimp and save the file (remember to use "save" not "save_as"). This should help to keep as much of the original formatting as possible. With regards to the team colours, the game seems to use the colour RGB: 000 000 255 (Blue) and "brightness" values thereof to designate areas of the image to be replaced by the team colour. I will look into this a bit more and will let you know when I have something a bit more helpful. With regards to the unused explosions you have found, my advice is not to bother with them. Westwood left an awful lot of unfinished stuff in the final .rfds and most of it lacks the necessary data to function properly within the game. If you really must persist then try altering an existing entry to include the data you require. you can even try making a copy of an existing element (say explosion or model) alter its attributes then create it as a completely new element. This is quite complicated and prone to going very wrong but can be done! Hope this helps :)
