I have been trying to find drivers for this computer that work. Please help me any suggestion is welcome.

The card's info:
Product ID: 0x0004
Vendor ID: 0x15a9
Version: 0.01
Speed: Up to 480 Mb/sec
Manufacturer: Ralink
Location ID: 0xfa10000
Current Available (mA): 500
Current Required (mA): 300

I also have a wusb54gc, but i have no idea how to install it!