You can use your Genie client and record things to your Genie. However, if you have a 2nd DVR you will be able to view recordings, but you can't tell client to record to 2nd DVR
What appears to happen is that while the List View shows all DVR recordings in aggregate, a recording will only actually record upon the receiver that's physically taking the request.
You can see which physical DVR houses the recording in List view via a bracketed DVR name that's prepended to the recording's title.