get the scene you want, hit the 'print screen' button on your keyboard.
That saves it to your NwN root directory. then open up your favorite editing program (photoshop works great) Browse your folders to the NwN directory and select your pic... it will be named "screenshot000' with another digit on the end I think denoting screenshot 1,2,3,4 etc.
You can edit the zoon level and such and crop out the stuff you don't want and save it again.
There are player photo albums too (click the albums link near the top of the forum) you can make your own album, but make sure the file size is under 200k.
Vyris