Okay, I converted my .jpg files to .tga files on Adobe Illustrator, and then I put them into the custom folder I made to view textures I've made.. but they are transparent. Why?

Maybe u didnt merge the layers?
And u only saved the transparent one
try to open it alone sse what u get
and try putting textures to someone who has full set

You can't merge layers in Illustrator... Also, you can't save .tga's with transparency.

Save it as a .png, remember to hook "use artboards" and import it to photoshop or gimp and save as a .tga.

Yeah, I found out how to do it a little earlier from my girlfriend before you posted, Fenris. You're right, thanks a lot!

Also, thanks for trying to help, scorpionma.