Issue making mod

I'm trying to make a van texture mod myself by editing an existing van mod, which DOES work in game.
So I take it, convert from .TEXTURE to .dds, edit what I want to edit, save as .dds and then rename back to .TEXTURE
However, after I make my edits, my mod doesn't seem to work in game. It detects in the mod list but it simply shows the game default van. Does anybody have an idea that could help me out?
Replies
No problem, just fix next time you post a thread xD
Yes Photoshop is extremely better. CS2 is free from Adobe but you can get a free cracked CS6 from certain sites.
Good
Good
I'm guessing it is because after you edit it it is not saving correctly because of the .dds format and using paint.net. Also, check again to make sure the file path is right and you're not missing any folders. Based on what you have said, those are the only things I can think of that it could be.