Word of caution. Think long and hard about doing S-video. Without much cable building experience, these rascals are tough. As a novice, I once tried these, and quickly got frustrated. As a pro, they are one of my favorite cables to build. But that enjoyment came from much cable building experience before embarking on S-video again.
Nice collection of URLs guys. Chris White's web page also had DIY information. But he didn't mention it himself.
Lex
CAT