A bit more information from a helpful developer of Screen Cap programs.
I would guess that these programs uses GAPI (the game api), which gives them direct access to the display hardware, thereby circumventing the normal Windows API for faster drawing. Unfortunatly, this also fools the screencap programs, since they normaly use something like GetDC(NULL) to get the current screen from Windows. As a workaround, try looking for programs that uses GAPI to take the screenshot. Im sure there's plenty out there somewhere. =)
With all the software reviewers out there, I thought for sure someone would have found a cap program which solved this issue, but have not been able to find one. Has anyone see something which would work? Thank you again.
(Here's a plug for his program, which is free, and sits on your PC, making getting caps much simpler. They will be expanding support for jpgs and other file types soon. Look for "GetPDAScreen" on this link:
http://www.newmad.com/software.asp )