Gallery Tutorial/ with thumbnails

Hello there!

I´m new in this forum and tried to do the following tutorial:

http://www.kirupa.com/developer/mx2004/thumbnails3.htm

Sorry, but i don´t understad why the “thumbnail_mc” must have the fixed position (empty thumbnailMC movie clip will be - x: 22, y: 289 ).

I would like to create a gallery the same type, but with other style and definetely other size. I tried to take these gallery and move it on another position of my desktop. Everytime i lost the thumbnail-slider. It doesn´t work on a different position…why?

Sorry but I´m not the best in Flash…I´m a beginner and maybe my problem is to funny for advanced users.

Thanx for help and greetz

construction