Is there a way to use the drive builder image subsequently install the software using only linux? I don't have a windows machine at the house anymore.
Currently, the first install of a new piece of ".upgrade" software on a fresh drive on the Empeg truly does require Windows.
I do have virtualbox and tried to setup the serial port but that's not working either. Then again, I'm trying to get *any* output from /dev/ttyS0 and it's not showing anything.
I think others have successfully gotten the ugprader working through a virtual machine like that, so you're on the right track.
Your other option is to find a friend with Windows and a serial port.