It isn't the Smarty you want to be messing with, it is the html. Look for this line of code in the template:
Code:
<TD align="right" width="100%" height="20">{$lng.lbl_subtotal}:</TD>
and replace it with this:
Code:
<TD align="right" width="80%" height="20">{$lng.lbl_subtotal}:</TD>
see if that does the trick
