Well, I'm using an S-Video cable because that's what was connected to it when I received it. That's what the previous owner had been using to connect to their internal video tuner card. Their card unfortunately only gives me black and white feed when installed in my PC, and yeah, can't install it in my laptop to try.
As an external option I've currently got a Compro Technology video tuner that, once again, gives me only b/w feed (and quite fuzzy)
Thankyou for the info, I think I'll have to head out tonight with the cable and ask a electronics supply store for the composite equivalent for the outgoing connection.