Linux & DirectPC

Is it possible to run EarthLink / Hughes DirectPC thru a RedHat(v7.x) Linux box?
DirectPC is currently shared thru a Windows 2000 PDC (Primary Domain Controller). I need to rebuild this PDC, but need an Internet connection for downloads during the build / patching process.
EarthLink is using a USB device – Hughes DirectPC IDUR1 / IDUT1.
What, if anything, can you suggest?