Help with attachmovie

I am trying to do a similar gallery like on
http://subdisc.com

I’ve come to the conclusiont his was most likely done using attachMovie. I want to make it so in the XML file it will take a new line i’ve added and keep attaching a movie in an array.

I am not to good with actionscript.

My guess is it’s similar to a drop down menu, but I really don’t understand how I’d load an imagine into the array as well

If someoone could help me it would be greatly appreciated