Unfortunately you have to own CS5 for it to be that easy.
TUT:
1) open pic in PSD
2) create some sort of selection around what you don't want in the pic
3) Go to Edit>FIll>Content aware fill>ENTER
4) show off on a public forum.
I'm looking at the deal with apple, where you order a mac and can get photoshop for cs5 extended for like 180 if you can prove you're going to college, which I am. Should be pretty cool, this would make removing dust from negatives so much easier.