I have a sometimes ailing GEOSAT pro DVR1000ci.  I'm, like many others, waiting for the new DVR 1100C.
I have an old DirecTV DVR with two-harddrives.  Can I use this DVR in place of my GEOSAT DVR 1000ci? 
I know, I could take it out of storage and try it  - but, maybe some of you folks could...