In the research I've done in trying to solve the problem I keep reading this doesn't work properly. But have never tried.
I've messed around with an old PC to run on my CRT with outputs from an old NVidia card through to a composite Scart adaptor and it works really well. I recently bought a cable to connect it to component (for hi-def) and although the clarity is great it has an annoying purple tinge which is a common fault of the card I have apparently.
I've saving my pennies to get a HDMI set up though - many PCs now have that as an option. No messing about.
Here's a handy site anyway:
http://www.techlore.com/article/10061/H ... o-Your-TV/And if I had the bucks and didn't have a complete aversion to Dell, I'd go for something sexy like this:
http://gizmodo.com/5403000/dell-zino-hd ... theater-pc