First set up your broadband connection with the equipment provided, to ensure it works correctly.
Second you will need to buy a router with wireless capability. Netgear is a good make.
Goto www.dabs.com/uk and search for quicklinx 2VCDWS.
As well as the laptops having wireless adapters, you will need to connect to the router via a lan (cat5) cable in order to configure it.
You transfer your username and password settings to the router.
The idea is that the router negotiates the internet connection and the 3 machines connect to the router.
It is a quite straight forward process (if you do it every day like I do), but just follow the instructions, as they are usually comprensive and easy to follow.
A router will cost about �100 and you may need a network card for your PC if it does not already have one.
The following link may provide some useful info.
http://computer.howstuffworks.com/wireless-network.htm