Need help, 7800 GT

I just got a 7800GT in the mail today. It came with the VIVO cables, but it didn't have one that I could use with my TV. It uses the Yellow, White, and Red cables. I know that all I run from the video card is the yellow cable. It didn't come with a peice I could use to do that. Where could I buy/get this cable converter.

Also my video card took up all my power connecters because unlike my old card it needed 2 plugs in instead of just 1. Where can I get some spliters so I can connect my cd drive.

Last but not least, what program would be the best for overclocking my video card. Monitoring temporature and fan speeds.

Radio shack or walmart probably have this simple S-video to composite cable. Radio shack definitely does.

I can't find it anywhere. Please help.

check online stores
if all else fails

ebay