Hi!
First of all, you should check the last webinar doc for more details.
This section describes how you can replace menu items with your own ones:
http://kb.x-cart.com/pages/viewpage.action?pageId=7504837#Webinar2-10Apr2014-DesignchangesinX-Cart5(Custom...thmyownme nu?
Please, let me know if it helps.
Tony.