easier is this (aatleast in my opinion): just crank up your game resolution to like 1200xsumthing
just one of the highest resolutions...
i know your fps will probably suck but hey its only for the screenshot...
then take what you want to be the screenie and make sure the health meter and stuff dont cover anything you want on it (so make sure the final picture you want is in the middle..
then use Paint Shop Pro (free 60 day trial at
http://www.jasc.com) to open the screenshot and just cut out the part you want without all the crap on it...