macromedia flash sitedesign: ah thats alright

Hello, I believe that doing a fullscreen flash site (liquid) is the best way
for you site to look good on a 17" or 30" monitor.

But I don't understand what settings I need. I put the stage at 1024x768.
However A normal users resolution is lower than this due to the brower windows
and toolbars.

What size should my stage be, and should I put width and Height to 100 percent
in HTML file.

I don't want to use the resize because my site looks bad quality.

What actionscript do I need to get it to centre on users screen,liquid or
atleast support 17" and 30" monitors.

Thanks.