You should use the images as your table background instead of simply placing them inside the tables.
It would look more like:
Code:
<td colspan="3" rowspan="6" style="background: #000 url('blah.jpg')";>
This is the content of your table cell
</td>
Be aware, though, that using tables for strictly layout purposes is now considered bad form in HTML. Tables should only be used for presenting tabular data.