Spent most of the day monkeying with a new style. It is by no means finished, but you can see it if you manually switch to the Alternate stylesheet.
Bugs(?):
* Opera is very sluggish with this stylesheet
* Firefox displays an odd white band across the top and bottom.

To do:
Fix bugs above
Get the generated code for the side panels adjusted to use my twiddled versions (vert_banner_5.png and vert_banner_6.png) or use all CSS for inserting and placing them.
Decide on menu placement.
Edit table styles
Do we want to twiddle the XHTML display for images? It currently does not include a link for alt.css - and there appear to be other (IMT generated) stylesheets associated with these images - check with Martin.