I just installed a wireless system on my G4 using the Motorola Card and works fine. I have a Linksys WGT54G wireless router. My neighbor a 1/2 mile away bought a 15 db antenna and he can log onto my network and internet connection. The router was using its stock antenna and he was getting a 14% signal level. I also installed a Linksys PCI card in a PC that I have to use to run a couple programs and I use it solve other people's PC problems. My Mac just keeps charging alon. Also both Mac & PC talk with each other and share files. It has been a learning experience for me Russell