Here is another very good link regarding hacking the Tivo. Everything I read about this device tells me that is renders VCR recording obsolete. I also love the fact that you can open it up, add a larger hard drive and get up to 245 hours of recording time. This just blows VCRs away. Also, the ease of selecting the show you want to record is mind boggling.
TiVo Upgrade components including Disk Drive, Mounting Bracket, Torx Wrench.