I already suggested using Banshee on the first page of this thread a while back, since that uses libimobiledevice - a software written entirely for the purpose of communicating with the Apple devices.
I don't know why my suggestion was ignored. Maybe OP likes horrible command line solutions and tampering for weeks without a solution more? ;-)
There also is an alternative firmware for iPods available here:
http://www.rockbox.org/
That should be able to use USB drive mode, like most of all music players on the market.