Directtv dvr

I have a Directtv model R-15 and a Directtv Tivo R10 (still running strong) and I was wondering if there is a way to transfer programs to my computer via the USB ports? I heard that the USB ports are not working on both units, but is there any way to accomplish this maybe with a external hard drive? I’m still waiting to see if BlueRay will win the fight for HD, so I don’t want to buy a DVD recorder yet.

the usb ports are disabled, so HOW should that work?