You'll want to, I think, open you
global.php file and find this (around line 270):
PHP Code:
$header='';
$footer='';
Right after it, put this:
PHP Code:
eval("\$leftcolumn = \"".gettemplate('leftcolumn')."\";");
Then, create a template called
leftcolumn, put whatever you want in it, and use the
$leftcolumn variable as you please. I think that ought to work; though I haven't tried it myself.

I might be missing something.