Yeah, so basically, how do you do it? I've never been able to find an explanation in the manual.
Taking Screenshots
You press the print screen button on your keyboard. (Might be labeled for example Prt Scr like on my keyboard.) After that the screenshot is saved both on your clipboard and in your NWN folder as a .tga file (which a is a raw picture file format).
Depending on which file you want to use, the course of action you should take is a bit different.
If you want to use the file in your clipboard you simply open your chosen image editor (even MS Paint will do, although I don't recommend it) and paste it in simply with ctrl+v. After this you save the file.
If you want to use the file in the NWN folder, you also open up your chosen image editor (except that I'm fairly certain MS Paint won't do it this time. Ifranview should be fine though, or for example Photoshop). After you've opened the file, you just save it without any modifications (unless you want to make some of course ;)), but in a different file format.
There's basically two file formats you should consider for web usage. .jpg and .png. Both will do fine, although .jpg tends to be a more common choice since it's usually got a smaller file size, which is usually an important feature on the internets.
Now if you want to show the screenshot to others here on the forums, you need to do the following. First you need to upload the picture to a site like Photobucket or Imageshack or to any web space you might have.
After uploading the picture, you simply make a new post on the forum with the picture addresses between For example:
[img]http://imageshack.us/yourpic.jpg[/img]
Thanks Dopson. The Dark Night be with you.