I have an old DVR-510 receiver with UHF remote from about 4 years ago. I now have a ViP-722 and a DVR-625. I'd like to use my old DVR-510 remote (which again, is UHF) to operate my DVR-625 receiver, which is in my home office. Is this possible? Can I use the UHF control, so i can keep it in my guest room to control the 625 thru walls? Or am i limited to the IR capability, which would make it useless?....Or maybe I can't use it at all!! Anyone have any ideas on this? Thanks!