Im ready to start with setting up CUCM and doing some configs. I currently have installed CUCM 8.6. Installed on a VM Workstation using 200GB HD and 2GB Ram. Everything is up and running and I can reached the GUI and ready to go but I dont know which way to go. I have setup CME on my 2801 and can dial out/in and VOIP to VOIP. Questions are this?
A) Do I need a Unity server for voice mail.

If yes, what version.
C) Any other kinda server software needed.
D) Does the CCNAV book teach you how to direct phone traffic to the CUCM instead of the router.
E) Is CUCM once up, easier to use them CME on the router?
F) Do I still need my 2801 with FXS and FXO Vics?
G) Does the CUCM server need to be on the VOICE or DATA VLAN?
Basically I need a road map to get me started from those of you who have walked this path allready.
Thank you in advance!