Alternatively, you could use POV-Ray. It's a bit more advanced than using FRAPS, you will end up with a completely different look, and won't have access to the ingame shaders, but videos rendered with POV-Ray can look pretty amazing.
"Call yourself alive? I promise you you'll be deafened by dust falling on the furniture,
you'll feel your eyebrows turning to two gashes, and your shoulder blades will ache for want of wings."