The only way I know is
HTML Code:
<table width="100%" border="0" cellspacing="0" cellpadding="0" background="JustlaxRight.jpg">
<tr>
<td align="center"><img src="JustlaxLeft.jpg" alt="" height="60" width="281" border="0"></td>
</tr>
</table>
It's going to be a bit jagged. It would be beest if JustlaxLeft.jpg did not have any of the diagonal lines.
Try it on a plain html page.