I deleted everything in MonoBook.php from:
<div id="column-one"> to:
</div><!-- end of the left (by default at least) column -->
which seems to me, is the entire div, but the main section still won't shift left. The 100% tip didn't work unfortunately, or maybe I applied it wrong (I added it to #content).
In
skins > monobook > main.css
This rule:
#content { margin: 3em 0 0 12.2em; padding: 0 1em 1.5em 1em; background: white; color: #8c594a; border: 1px solid #8c594a; line-height: 1.5em; position: relative; z-index: 2; width:600px; }
sets the left margin for the content box. If you diminish the "12.2em" left margin, that content box will move over to the left.
Tim