man, looks like I joined GW just in time, two threads that are up my alley.
If you didn't read in the farming video thread one of my hobbies is making cartoon using images of games. I did one for UO about a beggar named Soupy Dreck. I use still set to music in a moving format.
Anyhoo, if you want to get better quality screenshots and be able to set the size, get this free screenshot taker.
MWSnap
You can set it to send the pics to a file folder, and hotkeys for taking pics on the fly, as well as size settings. It's one of the better freeware proggies out there.