Infinite menu trick

fellow kirupians, lend me your ears…and actionscript.

im making one of those infinite menus where it appears to scroll over and over again…i found the tut on here.

what i would like to do, is instead of having the menu continuously scroll, have 2 buttons, one for scrolling he menu to the left and one for scrolling menu to the right.

could anyone help me out with this?