The drive in my HDVR2 seems to be failing, so I picked up an identical working unit. Unfortunately, DirecTV will not activate the replacement unit, because HDVR2's do not have RID numbers (not clear if this is just policy or a hardware issue - apparently a change from past practice). It's my understanding that the software resides on the Access Card, and of course, I will reuse the original Access Card. I realize I can get a free DVR replacement, but I'm happy with my TiVO unit and before making any drastic changes, I plan to wait until HD TiVO's are either available or finally declared to be vaporware. Questions: Can I simply replace the failing drive with the good drive and be back up and running? If no, are there any other options allowing me to keep my HDVR2?