As posted on Xfernal.com, here is the code for DotNetNuke Skin HTML Table Trick. This will help for search engine optimization by making the "Left Menu" aka LeftPane appear to the user as expected, but appear in the HTML code below the ContentPane. This will help getting the main content of the webpage above the navigation, making the content more important than the menu when indexed.

Here is the code: 

<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

   <TBODY>

      <TR>

         <!-- skip to second column -->

         <TD vAlign=top align=middle width=180></TD>

         <TD class=ContentPane id=ContentPane vAlign=top width="100%" rowSpan=2 visible="false" runat="server"></TD>

      </TR>

      <TR>

         <TD class=LeftPane id=LeftPane vAlign=top align=middle width=180 visible="false" runat="server"></TD>

      </TR>

   </TBODY>

</TABLE>