Loading thumbnails from main image

Hey there, first of all great forum, have learned a lot from you guys.

My problem:

Ive been doing the add thumbnail tutorial (http://www.kirupa.com/developer/mx2004/thumbnails.htm) and am no trying to modify the gallery.
I have linked the thumbnail array to the main image and resized the target_mc. Now i just cant get the thumbnails to sit at the right spot. What do i have to do?

thanks for your help