The Green Button seems to be the forum of choice for all Windows Media Centre Community Web Site problems they are found at:-
http://thegreenbutton.com
also check out this link for info on set up of the IR blaster cable:-
http://www.pprune.org/forums/computer-internet-issues-troubleshooting/294577-windows-media-centre-cable-tv.html
scottbelton@tiscali.co.uk