Whatever you do don't use behindview 1, it's uuugly. Obviously they'll have to do something with that for MP, but for now, it's pretty crappy looking. ; p
Then again, none of the Unreal games were really very playable in 3rd person (camera is too low, no crosshair), not like the JK series. Still, it would be nice...
In regards to taking screenshots you can bind a key to them in the console. I use F12 for taking shots.
It saves them in /Gamedata/System/ as a bmp file if I'm not mistaken, just like UT (obviously). ; )