DFS and Share Folder Access

HI all,

   I have five sites and Five file servers. ( No DFS)

  Each site have its own sitedata share. 

  Other shares inside the each sitedata share on all five servers

  user folder is inside the sitedata folder i each server.

 questions: ( After setting up new DFS servers)

 1. Do we add User folder to DFS replication? 

 2. How do i  assign permission and map other shares to users? ( Currently bat file used to map shares- HR share, Payroll share etc )

 3. Do we create root share hidden or not ?  (\\mydomain.com\DFS$)

 4. I want IT users to map only  IT$ folder inside the \\mydomain.com\DFS\it$. How do i map it?  

 AS