Kylotan
If you're not using the POD XT as an interface, you don't need it connected to the PC at all! Just treat it as an external instrument plugged into your MOTU unit. Then the issue of the driver should never come up.
I must concur. I use the Line 6 UX1 with POD Farm as my interface, and I absolutely love it. But if I want to use my POD XT Live in conjunction with it, I have to use one or the other. I used to use the XT Live as an input interface when I had no other, using the USB cable to record with.
My solution now is: I purchased a small Behringer Xenyx802 line mixer, its audio outs go to the line in on the UX1, and I have various vocal pre, as well as every preset in my POD XT Live mirrored in POD FARM.
My Pod XT Live, my Alesis QS&, and my mics all go into the Xenyx, but I leave the eq flat and only use tone shaping within my own created POD Farm presets. The Xenyx gives me phantom power for my condesir mic, and I can leave it off for my passives.
As soon as my Alesis QS7 sells, I'll be getting the Aruria Lab Experience 49, and using only sounds in the box, so only the guitar/voc will go through the mixer.