I have a G4 Powerbook that I bought in 2001. I once bought an Airport Card for it, but returned it because I was having trouble getting the base station, the card, and the cable modem to communicate (the fault of the cable company). Now I have a Netgear wireless router with two Macs hard wired, a PC hard wired and a PC wireless. I'd like to go wireless with my Powerbook. I searched on the CDW site for an airport card and only came up with an Airport Extreme card. It mentioned that it works with "Airport Extreme enabled Macs". What would I buy for this PB? Thanks.