John,
Read through this.
http://www.perth-wrx.com/vb/non-wrx-discussion/35718-computer-home-dvd-help.html
If you can make it work then please let me know because I am still interested.
The biggest problem I could come up with (assuming you dont all want to watch the same thing on tv at the same time) is not video but the sound.
Anyways you are a smarter man than me at this stuff so let me know how you go.
Brendon