After 20 years of buying IBM I've just bought an iMac G5 20" with Bluetooth keyboard and Mouse and an Airport Express. I'm delighted, as you may guess! I already have 4 Windows PCs on a wired 10/100 lan at home. I just plugged in the Airport Express to the hub and hey presto I got Internet access from the iMac through the Windows machine with the broadband connection. So no problems there. The problem is that I cannot see the Windows PCs on the Apple network nor the iMac on the Windows PCs. So, how do I get this to work? I want to be able to backup from one to another, share printers, etc. Suggestions most welcome.