I have a iMac G5 and a PC with a cable modem that is hooked up to a SMC wireless router. I have a usb wireless adapter, but I can't get it to work with the iMac. I don't want to go out and get Airport yet, because everything is set up in a temporary situation until we figure out where everything is going to go. Is there a cheap solution to have the imac hope on the wireless, i.e. usb adapter? If so, what do I need to get?