Hello Mark,
How did you change the header.menu.tpl file? Did you edit the core file, or did you create a module that implements the change?
Also, what is the desired change? I'm not sure if I understand what you want to achieve. What do you want to do with the bold line from your message?
As for our technical support service - it is a paid service:
http://www.x-cart.com/technical-support.html Our staff will be glad to help you, but, unless it is a bug, you will be charged for using the service.