For a three column theme you need to use absolute positioning. Your rleft hand column is postitioned something like
[html]
leftcol {
postition: absolute;
top: 180px
left: 0px;
}
[/html]
The right something like
[html]
rightcol {
postition: absolute;
top: 180px
right: 0px;
}
[/html]
Adjust the numbers to fit your layout, and include the template files containing the <div id=leftcol></div> and <div id=rightcol></div> sections from within your footer.