Thanks for all your help. I have purchased Belkins 802.11g modem and router, along with new WiFi cards for the second PC and Lappy.
I will not have BB until next week, so at the moment I'm afraid to try to set up the wireless network before the modem can work. (Don't know if it's a problem really, but a friend tells me that BT seem to lable everything with a threat of death if you connect an ADSL modem before they connect you)
As it looks as if I will need at least two phone sockets at the entry point (one for the modem, the other for the phone, would this be a good time to buy a combined filter/socket? I think they are called MDK face plates or something like that?)
Your's very confused, and nothings out of the box yet!