trying to hook my dvd/vcr combo up to cable box and TV but need an RF converter I guess as the DVD won't play on my older SD tv without the RF modulator- TV has composite connectors yellow/white/red, plus component blue/green/red, plus 1 S-Video connector- the cable box and dvd/vcr combo also has all three connections, but the RF modulator only has composite yellow/red/white and S-Video connection, plus coaxial in and out- I want the best picture possible, what wires am I going to need? Am I stuck having to use composite wires? The problem I'm facing is trying to...