Dreamweaver mx Site Optimized For Fast Loading

I have a Dreamweaver website which is loading very slow. The main reason I think for the slow load is that I have a flash movie on it. I need the site to load faster. Most importantly I need the provider not only to complete the task of making the web page load faster but I need them to explain step by step how they did it so that I may do it myself in the future. I need the site to load faster without the need for me to remove the flash or anything else currently on the site. I'll reduce image quality but I will not remove anything. I think one of the main things I need is for images and flash to load in order instead of everything at once. The flash movie should be the last thing to load. I'll provide the site for you to view in PM.