how to make a 2 x 2 table using divs?

[fatrat]

hi, i would like to make a 2 x 2 table using divs.
i had:
<table>
<tr>
<td>
</td>
<td>
</td>
</tr>
<tr>
<td>
</td>
<td>
</td>
<tr>
</table>

and now i would like to replace it with divs.

the page is:
http://digitalpatriots.org/index.php?sid=af4e662564e90dfa8ebea638d1cb68d6&clan=0

the 4 boxes at the bottom of the main contents should be 2x2 instead of 1x4.

also, how can i bring my footer to the bottom of the page?
and, this page validates, but is it semantic?