You should be able to run multiple instances of cgminer and specify a serial number for a stick.
You dont need to adjust the voltage pot. I was running mine without touching it and getting 140ghs on all 6 sticks on gekkos usb hub.
Awesome thanks for the tip! I was able to figure it out and def squeezing out a bit more per stick now.
If anyone could point me to the right direction on fixing the USB port on the R606 I would really appreciate that. Would love to get this thing running properly

Might be a little late but just FYI the Newpacs will auto adjust based on the chip lottery so set your mhz to the highest your best sticks will run and let the others tune down. I run 8 sticks on a single hub with a 140mm 12v fan. Set and forget for as much as 600 if I want to run hot or down to 500 for cooler temps.