I just recorded a minute or two of full desktop recording while playing 5 accounts. I was able to get 15fps to the video, but when editing the video in sony vegas i had major issues. I appears as though the software can't support video files that wide (2560x1024). It's very choppy when previewing, and when I rendered it all the parts where the video should have been were blank. Also, I noticed you cannot set the video project to be 2560x1024, it has a limit on the width of 2048.

I'm going to try this again by recording with the divx codec. Maybe I'll be able to resize it to smaller video dimensions while recording.