As it's been a year since this thread's been bumped (Aside from Sim-X's snore):
Have a Time Warner Cable - Motorola DCT 3416 STB/DVR. Antelope Valley California.
So, has anyone with a similar provider/DVR recently managed to get an external SATA (eg, Western Digital My DVR) up and running? If so I'd love to get your set up instructions.