Modifying the TRS files possible?

[Foodstamp]

Used to, people would do sprite dumps every once in a while of all the unit graphics.

I am curious how they were able to do it, and if it is possible to replace graphic files in the game by inserting new graphics into the .trs files.

This would be useful for doing things such as changing icons for effects in unit screens, replacing site images etc.

Anyone know how to do this? And if so, can you give us a brief overview.

Thanks!