Using "print screen" and copying it into any image editing program to get a screenshot is a good way to get rid of that "ScreenTaker v4.00 - UNREGISTERED" thing at the top left.
I'd download this program if i were you...it's freeware, and a really good program to take screenshots, and store them directly on a server or somewhere local....
i've been using it for 1+ yr and it's really great
sorry that i can't link you to the page with a bit more information, but their mysql server seems down...
I just did a reinstall of win2k and i was forced to take the screenshot in 640x480 so the image could be small enough to post here. No image software just yet etc...