Daniel,
That was the biggest limitation I ran into as well. You could untag a single VLAN this way, but you can't bind the physical adapter to more than one virtual adapter at the same time. Even then, switching between VLANs is not as quick and simple as when it is natively supported in a proper working driver coming from the manufacturer. By now it seems like they will never release working drivers. Abandonware?
Thanks,
Novi.