Originally Posted by _gwenibe_

Well you can use photoshop if you have it or you can use Gimp which is free. Gimp is basically the same as photoshop ( not sure, I've never used photo..)

get gimp from:
http://gimp-win.sourceforge.net/stable.html

and for some great tutorials to follow for the Gimp:
http://www.gimptalk.com/

I'm not familier with Photoshop. I know you can either buy it for heaps and I think you can download a trial version or sumthing...

umm well i hope that answers your questions
or! you can just use paint! I've seen some pretty good jobs done with paint