I am running Ubuntu 9.04 and cannot get the Dynex Wireless-N Usb 2.0 adapter to work. i tried using the drivers that come with the cd. i clicked and dragged the .inf file into the Windows Network Drivers and this worked. It was working from saturday until today. Now it is saying that it is an invalid driver. I don't know what to do! :(

Standalone I don't think your Dynex Wireless G/Model DX-BUSB wireless card is supported by the Linux kernel or any third party drivers. You can try use ndiswarpper.

cd ~/folder that has your driver

sudo ndiswrapper -i [your inf file]

sudo ndiswrapper -l

now it should say:
driver installed, device present
sudo ndiswrapper -m
sudo modprobe ndiswrapper
that should start the driver, and in a few minutes, you'll have a working internet connection.