Size of movie

Im about to build a complete site in Flash MX and i want the site to be viewed in 1024*768 screen resolution.

What size should my main movie be in, on which I will build the rest of the site, so it look good in 1024*768 screen resolution?

Depends on the structure of your site. A way I mostly use is set your resolution to 1024 x 768, then experiment in Flash with sizes. Always draw a border around the edges of the stage, then hit CTRL+F12. It’ll open in a new browser window, in which you can see the size it will show up by the border you drew.