Thanks for the vote of confidence, Ex-Navy!
The adaptor to which you linked is very much in the same class as the ones I mentioned (and linked to), so that reinforces the feasibility for me. As I said, power should probably come from a PC power supply, or from an external Hard Drive enclosure (I already have one, so I'd probably use it for any testing I had).
I had an idea about this; putting the Recorder, a hard drive, the aforementioned adaptor, and a power supply into a slimline PC case (such as this, which comes with power supply -
http://www.ditcorp.com/itemdesc.asp?ic=CSEAPXDM317) and having a nice, stand-alone PVR. Extend the IR receiver from the Recorder to the front of the PC case, and you're set. As the Recorder runs off of 5V DC, you might even be able to pull its power from the PC power supply (though, as I'm not very practiced at hardware hacking, I'd be leary of trying it). All in on nice, warrenty-voiding package.
-Thanks.
/Mortal_Elf/