An "easy" way to record: use the video out of your 3D card to a camcorder. Then recapture the video and edit to create MPGs. This is much easier process if you own a miniDV camera & Firewire card.
btw, check out Machinima.com (
www.machinima.com) when you have the moment -- myself & others using game engines to develop animated films. A thread has just been started about using JK2 for films.