I'll just toss this out there... Fraps isn't the only game in town.
MSI Afterburner beta is free, very easy to set up and work with, the framerate hit is barely even noticeable while recording fullscreen, and most importantly of all, is free.
The only downside I've found is Afterburner will only record an active 3d application; it won't record things like ingame menus or mission briefing screens.