this would involve making your body_wrapper an actual wrapper and inside it, floating one div to the left and one div to the right, and then inserting a floating fix div.
i.e.
Code:
<div id="body_wrapper">
<div id="newLeftColumn" style="float:left; width:200px;"></div>
<div id="currentColumn" style="float:right;"></div> (AND ALL YOUR PREVIOUS STYLES)
<div class="floatFix" style="height:0; visible:hidden; clear:both;"></div>
</div>
</div>
that is in essence what you need to do. Give it a try and let me know.
Boog's