I`ve set up several using Belkin 802.11b routers connected to NTL`s Pace manufactured, Cable and Wireless branded STB.
All have worked fine so I would expect that `g` kit will as well.
I would suggest using the routers option to clone the MAC address of the currently connected PC which will make setting up the connection easier.
Try this link for lots of NTL setup help click here
One final word:- I have not tried the `g` kit but I have read that some people have experienced problems with range/signal-strength, you may want to do a search for threads on this or perhaps a post asking for comments from people who have used it before spending your money!