Concerning putting a wireless mini-pci card, it has to be small enough to fit into the opening first. I had three cards, a Cisco IBM card actually for the T40, a Ruby Agiere(spelling), and the Intel centrino card. The Centrino card was small enough to fit. The antenna was taken from a Toshiba notebook that didn't have a mini-pci card but just a open slot for further expansion. So I removed that, and put it into the 600X. I installed the drivers and it works. Currently I am using Win98SE on the system so drivers aren't a problem.