Hi all. I'm running a PowerBook G4 15" FW800 (running 10.4.11) which has only ever connected to the internet via an Orinoco Wi-Fi card, and I'm trying to upgrade it to a better card whose signals aren't stopped by a couple inches of walls. So I bought an AirPort Extreme card on Ebay and hooked it up, but it's not working right. I'm hoping for some advice. Note that I don't have an AirPort base station; I have a Linksys router, which the Orinoco card was able to communicate with fine. Anyway, I got the AirPort Extreme card (no software CD included), and hooked it up as demonstrated in this video. My laptop already had some AirPort software on it, which refused to acknowledge the existence of the card. I then I installed the software available here, which seemed to overwrite the previous set of software; I also ran Software Update. No matter what, the laptop refused to acknowledge the existence of the card. Applications->AirPort Utility, AirPort Admin Utility, and AirPort Disk Utility all turn up blanks. AirPort Utility, for example, just says it's "unable to find any Apple wireless devices". The software that was there before I installed the software linked to above gave a different message. Any advice here? And by the way, if I do get the laptop to recognize the card, will I even be able to connect to the Linksys without an AirPort base station or something?