yes, just select 2 cores in the cpu affinity for each command. wow operates better on 2 cores. (anyone know which hyperthreads are actually on separate cores? 0+1 == core 0? or is it 0+4?)

also, make sure to set your maxfpsbk and maxfps fields within the command. this will radically reduce your cpu and gpu requirements.

also, make sure to turn off shadows. to do this, open a single wow.. turn them off.. then exit completely. this will force the settings to write to disk so the next time you run, all your wows will pick up the new setting.

also, watch for the update... it will provide a few tweaks that will make setting up a bit easier.