If you are unable to get hold of a copy of Photoshop, may I suggest "The Gimp" (
http://www.gimp.org/) - there is a Win32 fork here:
http://gimp-win.sourceforge.net/
Freeware, opensource image manipulation software of the same magnitude of Photoshop. I haven't actually tried it since I own Photoshop (older copies can be had for cheap, I find).
Give it a try
