I have a PC tower with two printers and a wireless linksys wp54G router attached. This is set up as WPA. There are others in the house who use their MACs for access to the internet. So far all is successful. We have an Airport Extreme (an older model where the device looks like a large white UFO on acrylic legs) which I have heard from others that can not only allow the mac users to print remotely, but may be able to extend the wireless network to the other side of the house. Can anyone give me some instructions for setting this up?