[nerbert]

I built a page with a left column (referred to as side column). Maybe it will give you an idea.

<style type="text/css">
<!--
.side_column {
        width:250px;
        clear:none;
        float:left;
}

.side_column_container {
        margin-top:12px;
        width:250px;
}

.right_block {
        margin:0px 0px 0px -290px;
        float:right;
        width:100%;
        padding:0px;
        display:block;
}

.right_block_container {
        margin:12px 0px 0px 290px;
        display:block;
        padding:0px;
}
</style>

<div  class="right_block">
        <div class="right_block_container">

                HTML for right block

         </div>
</div>

<div class="side_column">
          <div class="side_column_container">

                HTML for left column

          </div>
</div>

Float your right column over first then the center body, then float the left column to the left