I posted on the other forum, but i'll answer differently here....
Using a Celeron 1.2mhz machine, I installed an ATI VE card in a PCI slot.
This card does double duty as a video card, and multimedia card.
I fed my cable into the cards' connector, and recorded shows to the hard drive just like using a VCR.
These movie files quickly used up space though, especially at higher quality settings.
Also, I could only record the show that the cable box channel was on at the time.
I did have a timer though.
I then bought long RCA cables, and fed the show/movie from the computer to my TV for watching in the livingroom
It worked well as a VCR, but not as a TIVO.