Controlling an El Sequencer with Actionscript

Hello!

I want to control this EL Sequencer - COM-09203 - SparkFun Electronics el sequencer live with a flash application.

I figured out that i can program the el sequencer with arduino-code by plugging it to the computer with this ftdi thing

can i now control the el sequencer just like an arduino board with flash like this? (can i simply upload firmata to the el sequencer and communicate to it via serial proxy)
http://blog.jvers.com/?tag=flash-as3glue-arduino-firmata-pcomp

Thanks for your help! Im open-minded for any questions!