Hi there I made a similar app which was basically a searchable street map of the entire UK city of Cardiff. I initially started off using imaging Lingo to copy the relevant section of the entire map however this was far too slow when scrolling especially as the client required it to scroll at 10 different zoom levels.
I found that using a flash sprite was an ideal solution as it had the ability to zoom built in and the performance of scrolling and zooming at the same time was very good. Please feel free to email me if you have any questions about this approach. Cheers Paul http://www.themediakitchen.co.uk [To remove yourself from this list, or to change to digest mode, go to http://www.penworks.com/lingo-l.cgi To post messages to the list, email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED]). Lingo-L is for learning and helping with programming Lingo. Thanks!]