You dont need a Windows driver for the Linksys adapter to run on bactrack 4. But speaking of windows, it should work on windows right out of the box. As for bactrack the current rt73usb driver for the linksys WUSB54GC seems to be unstable. It will support injection and WICD, mac address spoofing, etc. and then randomly stop working for no reason. You have to unplug the adapter and re-insert the adapter a couple times and start a new dhclient on wlan0 each time you unplug. And then it will work. It doesn't stop working in the middle of activities but usually when you boot BT4 it wont be working properly. At that point re-insert and reboot. There is another driver you can install but I'm not sure how much more stable it is. Here's the link to a tutorial for installing it http://www.google.com/url?sa=t&sourc...JRMX_6StG6W2Gg . If your new you might run into difficulties. I recommend ditching the Linksys and getting the alpha or you can keep it as your secondary adapter. Maybe one you just use to do airdrop while your pentesting and the alpha for the fake ap or something like that.