At the drivers needed list: http://www.linuxdriverproject.org/twiki/bin/view/Main/DriversNeeded I saw one named as Passmark USB loopback test plugs. Looks interesting for me. So my question is: a. Anyone working on this yet? b. Currently at the Passmark site, are listed all the windows drivers. I thought of just converting all those from windows to Linux - from those who have experienced before, any comments? (difficulties to be encountered, conformance to Linux kernel design etc).