Help with scrolling thumbnail images

Hi
I’m trying to make something in flash mx 2004. Basicaly it’s concept contain three things.
First part is where I place external swf files, second part is thumbnail images, and third part is navigation buttons.

Main problem is how to list those thumbnail images? I have 81 thumbnail images that I need to put in a movie clip. Since all of the images can’t be placed on the screen in one time, I need to know the way how to list them using scroll?

Another problem is when I use navigation buttons, current image that is viewed have to have some kind of marking, so viewer could know what image he is viewing.

Thanks in advance.

Laki