Help...revised XML flash gallery

This was from thread -…V3_with_thumbs. What I like to revise is how I can make the image tween(anchor point) from the top left hand corner instead of the center? Basically I like to align the height with the thumbnails to the image.

2 other things is how I would like to add a rollover action to the thumbnails? And how can I add scoll button to add a new set of thumbnails?

See attached. Thanks for any help.