If you use this code in a block you should be able to put flash.swf straight into a block that will play without having to link externally.
<HTML>
<BODY><center>
<object classid="clsid:D27CDB6E-AE6D-11CF-96B8-444553540000" id="obj1" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" border="0" width="400" height="250">
<param name="movie" value="http://www.yoursite.com/yourfilename.swf">
<param name="quality" value="High">
<embed src="http://www.yoursite.com/yourfilename.swf" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" name="obj1" width="400" height="250">object>center>
BODY>HTML>
You can also use this code to show flash programs directly into your forum also just ensure you have "html tags" enabled answered by Kiwiguy in the forums. You can also use the debaser module.