Well if you’ve followed my HTML publishing set up, you flash movie should stretch to fit the majority of the browser window, and then add the commands I listed into the HTML body tag which can be found near the top of a HTML file.
But honestly it will look horrible. My suggestion would be to leave space around the flash file, because otherwise text, and images will be distorted and hard to read/see.
If you’re still lost, then perhaps I’m not following your question. If so, explain it again, or give me a link to your flash file so I can see what you are on about.