you describe my system exactly. The broadband goes to my main pc and I have a network card in that machine and one in my spare pc. These 2 are connected by means of a crossover cable. I have the main pc set for internet connection sharing and they both can see each other and use the internet. The slight drawback is that no. 1 pc must be on for no.2 to connect but that is not a problem for me. You could get wireless network equipment but I have not used it and do not have any knowledge of it. Should you have any problems setting it up just let me know and I will talk you through it.