Designer Needs AS3 Help

I’m trying to write AS3 code in AS4. I want to make the timelined scolling movie clip in the header pause on rollover and resume on rollout. Can’t figure this one out! : ( Also, do I place the code on my as layer or attach it to the mc itself ( which I know is sloppy form )? Any assistance would be so very appreciated.

link : http://www.blacksheepdzine.com/concord_financial

Thank You!