I am w/ JohnK on this one here, we need more info so we know we're talking about the same thing. If it is just ONE coaxial cable coming out of the ceiling, no way to convert this to component. You can however convert this to composite (yes, i know, its crappy quality, but some components still use it). You would just need to cut off the ends and put the the composite "RCA" connectors on.

you really need a digi cam to start taking pics =)