flash selected resizing

I have a swf embeded in an index. It is all vector based except for one gallery of which are pics. I want to enable the automatic shrinking of the entire swf when browswer resizing (to allow entire viewing on smaller screens) but want to restrict and further enlargement once the true (actual) size of the embeded swf has be reached. Is this possible and how do I do it?

use javascript to get the resize event of the window. If window is bigger than the actual size of the swf make it the swf size or disable further scale (don't know if the second part is possible).
When resize happens, send to your swf the current size of the window, and in flash resize your controls.
For this you need to know about window events in javascript and about communication between javascript and swf. Check these links to see how it's done:
flash from js
flasj js command