What you want to do is have these separate items be two separate movie clips inside the main movie clip. By doing this you can have three separate time lines and three different possible looping systems.
Right click on your element or elements and choose
Convert to Symbol > Movie Clip
The timeline of the animation movie clip would loop or play if it's simply an embedded movie.
The timeline of the button would play and then stop on the last frame
The main timeline of your scene could be a single frame.
If this doesn't make sense I suggest you take a look at some of the Flash tutorials here:
http://library.creativecow.net/tutorials/adobeflash
to familiarize yourself with the flash interface and the way it works.
Abraham
