Thefwa.com dynamic thumbnail grid fullbrowser help?

I am new to the “fullbrowser flash” technique that is getting big lately. I am a huge fan of the simplicity of “thefwa.com” site and how it repopulates all the thumbnails to be the width of the window -minus the right section.

Does anybody have the time to teach a little about how to set up an array that fills in the grid in order by date like that depending on what the width and height is. I thought it would be fun to learn and might help me understand arrays and fullbrowser actions better.

Thanks in advance.