I am not a website expert, still i guess my comments may help you.

The contents in the other pages are loaded from the xml files,(flashmo_219_page_1.xml)or (flashmo_219_page_2.xml).

I guess you know what an xml file means..

This is about the contents modification, if you wanna change the look n feel, the transitions etc. u need to edit the *.fla file and go to specific movie clip and edit.

u may need to edit the actionscript file also.

I am not in touch with flash for a long time.. have to go back to tell u more. :-)