I recently introduced me mom and dad to the world of mac with my older iMac core duo 20 inch. The problem is they live about 1000 feet from me and we were sharing wireless off of my linksys wrt54gx router. They had a old lindows laptop that had a wireless linksys usb adapter I had ran up in the top of their roof for a good signal. My problem now is that with the imac it cannot use this. Is there a alternative I can use for them in a wireless usb adapter? Any help would be greatly appreciated.