I agree with the Critic. You have to be carefull using those pics. There is alot of sites like www.gbacentral.net (currently under construction converting to www.dscentral.net) that are very protective of thier "exclusive" material and you might get in big _____ for using their stuff.
Still, I believe if your taking pictures of the net that are scans of game boxes, you will allways get away with that. Nobody really cares, cuz your scan and their scan are gonna' look identical anyways.
Another weird thing about screen shots - www.gamescreenshots.com pretty much just takes pics from sites like www.ign.com and than says your free to use them, when IGN would be very protective. Yes www.gamescreenshots.com has permission...but IGN doesn't know what your doing with their shots.
Kinda weird.
