Nice design! You do have a

Nice design! You do have a size problem though. Your swf is 550 x 400 pix. When you set the size to 100% it is being stretched to the size of the browser window (in ie) and netscape (or firefox) has problems sizing it correctly. The problem is your resolution is being robbed. Flash is designed for motion and animation to not take up too much space (barely more than the images themselves). You should take advantage of that by making a larger stage. 2 things I would recommend: 1 set the size in px instead of percent

Use:

  <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="550" height="400" id="SCREENINGROOMFIN" align="middle">
    <param name="allowScriptAccess" value="sameDomain" />
    <param name="movie" value="SCREENINGROOMFIN.swf" />
    <param name="quality" value="best" />
    <param name="bgcolor" value="#ffffff" />
    <embed src="SCREENINGROOMFIN.swf" quality="best" bgcolor="#ffffff" width="550" height="400" name="SCREENINGROOMFIN" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
   
  </object>

instead of:

<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="100%" height="100%" id="SCREENINGROOMFIN" align="middle">
<param name="allowScriptAccess" value="sameDomain" />
<param name="movie" value="SCREENINGROOMFIN.swf" />
<param name="quality" value="best" />
<param name="bgcolor" value="#ffffff" />
<embed src="SCREENINGROOMFIN.swf" quality="best" bgcolor="#ffffff" width="100%" height="100%" name="SCREENINGROOMFIN" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />

</object>

And secondly, you may want to resize the stage in Flash (although this may prove to be a major pain and you may have to edit alot of your symbols).

Otherwise, nice job and keep it up!