QUOTE(markski500 @ Oct 20 2006, 04:42 PM)
you need to use the sdk
More commonly referred to as XDK (XBOX Developement Kit). And yes that is one option. It comes in 2 parts, the SDK is installed on the PC and XDK installed on the xbox. Really alot more trouble to go through just to take screenshots.
There are also a few other programs out there that can do it, forget the names of them though. Maybe XBOX capture or something.
Or as said above you can just get a capture card (which is definatly the easiest route to go).