Flash as3 supplemental next button at end of swf

I have set up an array of swfs in Flash cs4/as3 ([login to view URL], [login to view URL] and [login to view URL]) that are loaded when you launch the container '[login to view URL]'. Each movie in the array plays for 3 seconds and you can use the round previous and next buttons to jump from movie to movie. At the end of each movie, a gray 'NEXT' button appears. I would like the programming done so the user can go from [login to view URL] to [login to view URL] to [login to view URL] by clicking either the gray NEXT button when it is visble OR the existing round blue button. Basically there are 2 next buttons and I need the programming done for the gray one.