I, too am having challenges with getting my Hauppauge MCE remote to work. It can pause and play and that's it. Did you find a solution or give up on this remote?
never got it to work well with MP. I switched to WinTV 8 and was using it as my PVR until Direct TV put some type of encoding on the broad cast that prevents me from watching anything in HD. So until I can find a answer for that issue I'm without a PVR