Honestly, let me save you the time. Unless you have a PC that has so much
power it needs liquid cooling you are wasting your time with ANY of the
products out there that capture the screen. PPT is so demanding upon
resources there is next to nothing left for video capture software. (Or the
capture software makes the presentation "jerky".)
On a fast (3.4 Ghz) machine with a gig of RAM, you *might* come away with a
low color (16-bit), 640x480, 10 frames a second video. If you want a better
video you might want to look at a Dual Processor machine with a couple of
Gig of RAM and multiple raid drives.
Austin Myers
MS PowerPoint MVP team