[Zope] User Screens and Login

Hi All, I am pretty new to zope. I have been asked to implement a project done by me in zope. I had user modules, group modules and some content management in my project(php). Now i need to do all in zope, which i not aware of. Please tell me what to do and where to start. PLease give me code for user module if possible. I should be able to create users and they should login thru the login page to enter the site and view the contents. I am running out of time to give my first module. Please help me out. Thanks S.Karthikeyan