Question #8: How can I capture the output of AVS as a video/movie file?
AVS doesn't have this function built-in, but there are currently 2 APEs (AVS plug-in effects, see Question #5) that can capture the video of AVS to an .AVI file. After inserting one them at the end of the preset you want to capture, you can configure and control it through the component's configuration dialog (on the right hand side).
Note that these will only allow you to capture one preset at a time and will not capture transitions. If you have a problem with one of these, you should probably contact the author of the APE rather than posting your question in these forums.
AVSGrabber.ape:
http://avs.acko.net/ by Steven Wittens (UnConeD)
Saver.ape:
http://www.dmc.dit.ie/pixelcorps/ by times2