[xwiki-users] Remove or change menu

Hi all, I like to remove some of the menu items based on the user logged in, for example for one type of users, I need to remove the Add menu, or change Wiki, Space or Page menus to my own menus, I checked the users rights, it has View, Comment, Edit, Delete, Register, Program, they seem not designed for that, any suggestions? I checked menuview.vm, that is where to control the menus, it seems I need to change this file. Thanks for your suggestions in advance. David