oder du machst das ganze inner tabelle:
<table style="float:left; border:0px;" cellpadding="3" cellspacing="3">
<tr>
<td style="height:100px; width:100px; vertical-align:middle;"></td>
<td style="height:100px; width:100px; vertical-align:middle;"></td>
</tr>
<tr>
<td...