If you want the PC next to the router (and Cable Modem / STB) then you shouldn't need anything else (both you NTL CM and router should come with an ethernet cable, afaik).
If you want to place the PC somewhere else in the house, you will need a wireless adapter. If you, or someone you know, is confident putting a PCI card in a computer, the Linksys WMP54G (
http://www.linksys.com/international...oid=6&ipid=232) would be a suitable adapter. If you don't want to open up the computer, you can get a USB wireless adapter.
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Is there an echo in here, Paul?