If I'm understanding what you want correctly, I believe that you should be adding a new row simply by a new <TR> </tr> tag set with your <TD></TD> tag sets in between.
Thus it shoudl look something like this:

<html><head><title>Table Output</title></head>
<table Border=3>
<tr><td>Row1 Cell1</td>
<td>Row1 Cell2</td>
</tr>
<tr><td>Row2 Cell1</td>
<td>Row2 Cell2</td>
</tr>
</table>
</html>


HOpe this helps.
Josh Wise