This line:
<TD width="150" valign="top">
Change it to
<TD width="166" valign="top">
Also change the spacer.gif at the bottom of the cell.
<IMG src="{$ImagesDir}/spacer.gif" width="150" height="1" border="0">
to
<IMG src="{$ImagesDir}/spacer.gif" width="166" height="1" border="0">