I want add new page ,like admin_adduser;

Question

I want add new link (name "add user") at qa-nav-user area (nav-user),when admin login ;

but I have two question:

1.how to add this link (like http://localhost:3571/index.php?qa=register&to=index.php)  at the qa-nav-user area  after admin user login?

2.if I add  link (like: http://localhost:3571/index.php?qa=add_user&to=index.php)),how to resovle this link  to my add new page qa_page_admin_adduser.php?

 

thank you vermuch.