I have a linksys wusb54g usb wireless adapter, and was trying to follow the instructions here to get it to work, with no luck. I finally found a site that said people with belkin adapters were having luck with a different driver from the same company.
As a shot in the dark I tried it, and it worked right off the bat.
I downloaded the .dmg file, did the install, restarted just as it said to, and then plugged in the wusb54g v4 adapter. Once that was done, the computer automatically detected it, and opened the wireless utility that was installed. I selected my network and encryption method, entered my network key and BOOM! It was ready. Then you have to open the System Preferences, go to Network, Again, the machine should announce that it has found a new network device, click 'Ok' but pay attention to what it's called, on mine it called it 'en1'. Select that from the drop down list, and then click the apply button. That initiated the contact with my wireless router.
The driver is is the RT71WUSB by ralink. You can find it on their site at
www.ralinktech.com, or at this link
RT71WUSB.
I hope this comes in handy for some of you.
Mac