Ok, I'm trying to embed an intro into my header swf...

When people first arrive to the site, I want the header on the index page to include an intro (which leads to the header/menu when it's done)... and every other page of the site to just have the header/menu with no intro.

So I'm considering having a index.swf which will include:
  • preloader
  • intro.swf (15 second animation/introduction to the site)
  • header.swf (contains header graphics and menu with links)


And every other page to just have
  • preloader
  • header.swf


My question is... when the header.swf is loaded through the index.swf by a user that comes through the index page, will they have to load it again when they click on another page? Or will the preloader recognize it's already loaded and pop it right up?



Also, what's the maximum file size that you would personally use for a header/menu on a website? 50K? 60K? 70? I'm trying to avoid using frames as much as possible, but I don't want the header/menu to take 30 seconds every time a visitor clicks on a different page.

Thanks in advance for all responses.