Thanks for the review. The 2.5 compatibility was a pain that I glad is over with. Hopefully Joomla won't make any drastic changes in the future.
-Go to components --> Custom Flash
-click NEW and inset your swf movie (like images.movie.swf)
-Add a new MENU and select CUSTOM flash as menu type
-Then choose wich movie (on the right side)
-click save or save&close
-open your site and click the new menu button you've made