The Adaper that comes with the PowerBook from S-Video to RCA + a Tri Color RCA cable + 2 Male to Male RCA Adapers + 1 Y cable (stereo mini-plug to two rca cables) That will set you up for full setup to use audio and video from the PB on the TV.
Other wise, you can use either a straight S-Video (Not S-VHS) cable or an RCA cable hooked up to the adaper.
TEG