Skin Texture to game?

okay so i'm learning here. Lets say i just exported a unit texture from the game converted it to .TGA format.
then did the texture painting to it, and converted it back to .blp .
Now , How do i get the texture to appear in the game of say some map senareo that i may be working on?

Use WinMPQ or TFT importer to get it into the map. Remember to put it in the same place and same name you got the texture from.