Modify an existing module to allow users to see some pages generated by the module, not only the admin.

I'm expanding a module, the "User Info".

This module is only accessible by the admin, but I want to make use of some pages (like user details) be accessible by the users. Now if I try to access to this pages without been logged as admin i'm redirected to the main page of the gallery.

How can I make it available to all users? and only for registered users?