my site is www.secondnatureaquariums.com.au/zencart.

A few things here:
1. Switch the "welcome, guest" message with the navigation bar (Home, Livestock, Products, etc). So nav bar directly under the header.
2. Apply the nav bar to every single page I create, past and future.
3. Change the colour of the info side box links (i've been over that CSS file dozens of times now...)