how do i change the screenshot instead of the minimap wich you see when u select it in a menu
make a 256x256 tga graphic, call it war3mapPreview.tga. Import it into your map using winMPQ (http://shadowflare.gameproc.com/dwnload.html)
For the tga graphic what program should I use to make that? I have the mpq thing i just need the tga making program. If you could help I"d be much obliged.