Last night I tried running both instances of WoW running from the same directory instead of off two different drivers and found that my performance went way up. Actually running from the same directory I managed to run both windows at max detail in 800x600 with average of 55fps. Seems to me at least with my setup the factor was running from the different drives for some reason. I would have thought that running from the same directory would have hurt my performance instead of helping it, but from my testing last night that wasn't the case.