Trying to manipulate a tutorial

I learn best by using tutes and figuring out how to make changes effectively. i finished the one at http://www.kirupa.com/developer/mx2004/thumbnails3.htm and managed to change sizes etc but i wanted to change it to a symbol to insert it in another flash file. i got that part done though the thunbs show up (number 3 to 5) and they do not scroll. i figure it has to do with the hit left and hit right and that the “path” not sure if i used the term in the right way changes when it turns from a scene all by itself to being inserted into a frame in a layer. i am not sure if i am explaining this right but i would really appreciate any help and I am sorry if this is a duplicate post, i have been searching for a long time and cannot find it or figure it out.

Montyman