If you get the file saved as a "swf" file, all you have to do is upload it, and then embed it into your html .
Example:
CODE
<!-- begin code provided by createblog.com -->
<object height="100" width="550" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000">
<param value="SWF FILE URL" name="movie">
<param value="high" name="quality">
<param name=FlashVars value="gCurURL=YOUR XANGA">
<embed height="100" width="550" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" quality="high" src="SWF FILE URL" FlashVars="gCurURL=YOUR XANGA">
</object>
<!-- end code provided by createblog.com -->
All you have to do is change to your desired width and height, url of the file, and the url of your xanga. I hope this helps