Just copy and past the code below onto your website. (Make sure you have updated your Flash Player to see this player.)
<embed allowScriptAccess="true" allowNetworking="external" enableJSURL="true" enableHREF="true" saveEmbedTags="true" src="http://www.humaniststudies.org/podcast/mp3player.swf" enableJavaScript="true" menu="false" quality="high" width="300" height="200" name="mp3player" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="&config=http://www.humaniststudies.org/podcast/config.xml&file=http://www.humaniststudies.org/podcast/playlist.xml" wmode="transparent" border="0" />