It looks like I can improve speed on the FSB with some new RAM, so I think I may do that to bring it to 333mhz. If I can find a cheap XP 3000+ 333fsb, I may grab it, too.
I think I found a video card:
7600GT. However, I am totally lost on tuner cards. I need a reccomendation there for one that will work with PCI bus, and hopefully has a remote (or will work with a Harmony).
After that, I'll likely be picking your brain for software help.