Location of "How to use this guide"

The content box "How to use this guide" on the Home page has an image of drop-down tab items that is 364 pixels wide. This means that it should only be used in the centre column which is usually 520 pixels wide (if you have 3 columns). If you use this content box in the left or right columns it will display OK in most browsers, but may cause problems in IE6 - we had one case where it displayed OK in the left column (though it was a bit hard to read because it was so small) but it pushed a content box from the right column into the centre column.