Yea, I had opened it in notepad a little while after, but then there were a bunch of little boxes, so I freaked out and didnt want to touch anything.
Ill try downloading Imgtool, thanks people.
Well, I downloaded a couple car mods. And it tells me to go in my gta3.img file or something. And when I try, I can't open it. I have PowerISO installed and it automatically tries to open it with that. But when it does, it says its an unsupported format. I dont know what to do. =[