I just bought the USB wireless donggle and when I tried it on my 64-bit PC, it didn't work because the "Vista certified" is only for 32-bit version. There's no driver for the dongle and even D-link website has no work around. It's kind of frustrated to know this only after I bought it. I search through the net and found no solution but a lot of people out there are having the same issue that I have.
 
After an hour or so, I didn't give up and finally I made it working. Here's what you need to do. Just search any 802.11g USB driver for Vista 64-bit. I have one here: http://www.downloadatoz.com/driver [...] 23231.html
 
Then go to the device manager, update the driver for the USB donggle. Select to install the driver manually, pick from the list as network adapter. Uncheck the show only compatible devices. Then, browse to the folder that you saved the driver. It will give a warning that it's not compatible but don't bother about that. After the installation, viola, it works! Though it does nto show as D-Link adapter, who cares as long as it works...

problem resorved