Siriux, making it flow

I've adapted the Siriux theme to add side columns, trouble is they cause the centre column to be pushed downward when the page size is too small. I've figured out how to edit theme.inc to remove the fixed page size code but when I do this it causes a bug that makes me unable to add modules to the gallery via the admin interface, i.e. show comments in the photo pages etc etc

Any ideas why this might be? Or, even better, how to fix it?

Oops, my bad.

Theme.inc changes below, items in bold were deleted and this fixed the page width issue but it caused other bugs to appear.

/**
* @see GalleryTheme::getSettings()
*/
function getSettings($itemId=null) {
list ($ret, $settings, $params) = parent::getSettings($itemId);
if ($ret) {
return array($ret, null);
}

/* Add in our custom settings */
$settings[] = array(
'key' => 'contentWidth',
'name' => $this->translate('Width of page content in pixels'),
'type' => 'text-field',
'typeParams' => array('size' => 2),
'value' => $params['contentWidth']);
$settings[] = array(
'key' => 'groupByYear',
'name' => $this->translate(
'Group sub-albums by year (album must be sorted by date!)'),
'type' => 'checkbox',
'value' => $params['groupByYear']);
$settings[] = array(
'key' => 'enableImageMap',
'name' => $this->translate(
'Enable prev/next navigation by clicking in the left/right half of the image'),
'type' => 'checkbox',
'value' => $params['enableImageMap']);

return array(null, $settings);
}

Sadly, don't think using the matrix theme is possible at this point but might be a solution for the future (deadline to meet on Monday).