I'm building a HTPC/file server... it won't have any capture card for now, since we have a DISH HDDVR. We just want to be able to rip our DVD collection to the PC, then watch them via my home theater.

I own and love the Harmony 520, and am wondering if i'll be able to use it to control this HTPC. Can I buy an IR sensor since the cases i'm looking at don't have one? And can I get the nessesary drivers or software for it? I don't think I need it to function as a mouse. I'll be using Windows Media Center, just I haven't decided between XP or Vista.

Any ideas or recommendations? Obviously my main priority is to use only the 520, since it controls the rest of my theater [TV, receiver, DVR, xbox [sort of], xbox 360, DVD player [which will be replaced by the HTPC]. I'd like to just keep the one remote if possible.