i think all you have to do is go to the channels tab of the Config app. This is the 'master list' of channels. set the channel numbers there to the ones you want and it should be reflected in liveTv etc.
[SIZE="1"]Building PVR-Only Machine for non-tech Uncle and Aunt:
Celeron 2.4, 1gig ram. Insight P4-ITX (mini-itx) mobo, 250w Shuttle silent PSU, slmline DVD rewriter, 40gig system HDD, 150gig Media HDD, Dual Riser holding Hauppauge PVR 350 and Nova-T, along with Nova-T USB2. MCE Remote 2005. Antique Art-Deco Radio for use as case when uncle finds one...