Button scrolling help

Hi, i have a flash file and i have says 10 buttons, but only 5 buttons fit on my file

i want them to scroll up and when a user puts his mouse over it, the scrolling stop

the 10 buttons would scroll continuously vertical!

and also, when a button is clicked, i would like a movie clip to appear on the side of the scrolling bar

how can i do this!?
please respond if you know
big thanx!