What did you have to do to overcome the usb driver issues? Actually what are the usb driver issues? Is it the same with bfgminer?
I have a feeling it had more to do with my system config than anything else. I set it up on a machine that I've used for mining for over two years and currently has a 7 series and two 6 series gpus mining at the same time.
The system has seen a multitude of driver update / downgrades / etc.
I installed the drivers on butterflylabs page and that got it working under easyminer w/ bfgminer, but cgminer wouldn't recognize it with a usb error.
I then tried the zadig utility, and that didn't help either.
I went back to the download page that butterflylabs links too and noticed a text link for a setup executable for the USB drivers. I installed that and then ran the zadig utility again and cgminer recognized it.