in site_html_template.cgi
sub site_html_print_cat

I commented out:

# my ($half) = int (($#subcat+2) / 2);

and
# We check to see if we are half way through, if so we stop this table cell
# and begin a new one (this lets us have category names in two columns).
# if ($i == $half) {
# $output .= qq|</td><td class="text" valign="top">\n|;
# }
# $i++;

Then I rebuilt the pages.
Alas, there's still two columns, and the first one has no formatting.

http://thechaos.net/alert