Something like sliding menu

hello in the swf below u can press the colored squares to move a mc with content on it like in the sliding menu but i want it to work on the real buttons so that the real buttons move along and u get new button when u arive on the next part of the mc

heres the swf
http://members.home.nl/kafmolen/EI.swf

heres the fla
http://members.home.nl/kafmolen/EI.fla