Well that page is a bit messy, but the white space is due to an extra row.
Remove this:
<tr>
<td><img src="spacer.gif" width="172" height="1" border="0" alt=""></td>
<td><img src="spacer.gif" width="1" height="1" border="0" alt=""></td>
<td><img src="spacer.gif" width="174" height="1" border="0" alt=""></td>
<td><img src="spacer.gif" width="174" height="1" border="0" alt=""></td>
<td><img src="spacer.gif" width="1" height="1" border="0" alt=""></td>
<td><img src="spacer.gif" width="174" height="1" border="0" alt=""></td>
<td><img src="spacer.gif" width="3" height="1" border="0" alt=""></td>
<td><img src="spacer.gif" width="1" height="1" border="0" alt=""></td>
</tr> |
That's most of your white space, the little bit that remains is part of the buttons, and need to be removed at image level.