So I've been online for at least the past 3 hours trying to get this working. I recently picked up the new Gigabit Airport Extreme so I could have faster file transfers between computers on the network, and whenever I try and transfer a file from my Mac Pro to one of my Windows (one Vista, one XP) comps, it goes ungodly slow. Now, my cables aren't Cat. 6, so that would explain part of it, but my transfers go at less than 1 mega*BYTE* per second, when it should really be going quite faster. I tried using a startup item I found to set the ACK delay to 0, I tried an old program called "Broadband Optimizer", and I tried a hotfix to run on the Vista computer, all to no avail. Anyone have any ideas to fix this? Thanks!