[Samba] Sernet Samba-4 Howto for Centos 6.4

[schmerold2 at gmail.com]

I have registered at https://portal.enterprisesamba.com, but am unclear 
regarding which packages to install for a fully functioning samba4 
installation, or if there are prerequisites such as krb5. I am starting 
with a minimal install of Centos 6.4.

I can make some reasonably educated guesses, but don't want to miss 
something important.

Anyone know if there is a step by step howto for installing samba4 on 
Centos using the Sernet repository?