Anyone know how to hook up a data projector?

[Brookerton]

I've got a used NEC data projector that I'm trying to hook up. Anyone know anything about these things or how to hook them up? Basically, I want to be able to watch DVD's on it and if possible hook my cable to it so I can watch TV on it.

Here's the owner's manual.
http://www.projectorcentral.com/pdf/projector_manual_621.pdf