I got this link for the EasyTether computer driver from user m4f1050.
Download EasyTether drivers - EasyTether for Mac OS X, Windows, Ubuntu and game consoles
I downloaded and ran the 32 bit version. Now I have a small EasyTether icon in the same row as the time on the bottom right side of my screen on Windows Vista. When I plug in my Rhodium 400 while in Android, I get prompts to download drivers for my Android ADB Interface. I cancel these (I always get 3 of these), and wait for EasyTether to detect my device. Then I rightclick the EasyTether icon and select "Connect via Android(000000000000)". TaDaaaaa!