Windows services / AD plugin

How, and in what order, do I configure these on my Xserve if I want to authorise user’s with their AD accounts and manage them in Workgroup Manager Groups, storing their Windows home on the Xserve using it for OSX home and enabling them to login on a PC and get access to OSX shares ?

I’ve read a few articles on the web but they are confusing e.g. We have a Windows PDC, so I don’t need to make my Xserve a PDC but to work as a Domain Member it mentions authorising against an OS X server that acts as the PDC.

cheers