Thanks to the info on this forum, I have upgraded my old TiVo for a second time!
I like to upgrade by using a larger hard drive. The advantage of this is that it frees a hard drive for my use. The first time I did this, I decided not to fool with the HD, but this time, I sure could use the 80GB hard drive that was liberated!
I attached the drive to my PC (Windows XP) and booted it in DOS. Well, it would only let me partition a small portion of that drive and not let me format it. My guess is that it is the inverse problem of when you accidentally boot a TiVo drive in Windows and make it almost useless.
So my question to the group is how do I make this HD friendly to the PC? It beats having to buy a new one.