What makes flash site small?

Question

I keep on building and expanding the site and it gets bigger and bigger. Now it is over 4MB and I still have to do plenty of image additons.
I assumed that if I trim all the images I should be fine. So I went back in and made sure that all the images are at 72DPI, saved as 24PNG, and scaled down to about 75% on the screen from its original version (I did this just in case if someone will have a larger monitor than mine so all of them have enough resolution/size to be enlarged and appear nicely) But the site is still too big.
Larger PopUp windows are done as UI Loaders so they can not affect the size of the main file.
I can not figure out what else can be done.
I use one image for all the symbols. For example there is a small button of a product represented as a product photo which repeats on the other section of the site as an animated collage. Animated collage would require a bigger photo of this same product. So I would import this bigger photo and use it for a bigger collage and smaller button as not to incert a smaller png of the same file and to increase the file size.
The frame rate is set to 30fps.
The rest is code.
Can anyone suggest or point me in a right direction to what are the standard practices to keep the flash site small and where the main size guzzlers would be located?
888acolyte.com

Answer 1

Thank you, I understand now. Image quality is at my own discretion. I am
the best judge of what I see on the screen. I went through the files and
was able to shave off 0.5MB in size.
Could you please tell me why it is better to use mc instead of buttons,
rather than buttons.
Is this the best code for creating mc buttons:
// Btn1 Over function
function amimated_btnOver(event:MouseEvent):void {
amimated_btn.gotoAndPlay("over"); // go into btn1 movieclip and play the
over frame label
// Btn1 Out function
function amimated_btnOut(event:MouseEvent):void {
amimated_btn.gotoAndPlay("out"); // go into btn1 movieclip and play the out
frame label
// Btn1 Down function
function amimated_btnDown(event:MouseEvent):void {
//this.gotoAndPlay("myLabel"); // play any frame label in any movieclip
// Btn1 listeners
amimated_btn.addEventListener(MouseEvent.ROLL_OVER, amimated_btnOver);
amimated_btn.addEventListener(MouseEvent.ROLL_OUT, amimated_btnOut);
amimated_btn.addEventListener(MouseEvent.CLICK, amimated_btnDown);
What is your opinion on creating buttons using tweener engine?
Thanks