Not sure who to ask
 

Some mods require that you change files in Armada II's directory. These files are of the .tt and .spd formats, which my computer cannot open. I was wondering how to do so, whether there is some trick to it or if I have to download some new program.

I have looked around and cant find anything that will help. Just point me in the right direction and I will be most grateful.

you have to open em with notepad

I also recommend that you go out of the main directory, select the A2 folder, right click and properties, de-select the read-only box and go apply to all sub-folders. Trust me, it'll help ;)