I believe that I saw on a flightpower site where they say that you can balance the fp pack with a thunderpower balancer. The plugs and wire orientation should be the same.

I'm using a thunder power balancer and when I've needed to, I just removed the wires from the plugs and attached them directly to the pins on the balancer. What balancer are you using?

I was able to get an adapter from cheapbatterypacks.com which allows me to balance a battery with a hyperion stle tap with a thunderpower balancer. They also have an adapter that allows you to balance a battery with a thunderpower type tap with a hyperion balancer.