Here is a link: https://cooltrainer.org/2011/06/17/m...ve-over-drive/
This also has instructions for overclock and region switch, but I've never done those, just s-video and comp/stereo jacks.

Modded around 6 or so gennys this way, and gives excellent results. I pulled +5v from pin 12 of the cxa1145 though, but it doesn't really matter where you get it from.

Here is another link to instruction for Neo-Geo that is done exactly the same way as the Genny (as it has the same cxa1145 chip) with good pics:
http://www.jamma-nation-x.com/jammax/neogeosvideo.html