CentreWare is in the machine, it's the webpage built into it and it is used to setup everything. So email is under Properties > Protocols > Email Server and the Addressbook is setup just like Outlook was originally (unless your addressbook in Outlook was created on a user by user basis, in which case the machine will need to be setup manually just like the PC) But if you do have a Global Addressbook you need to setup LDAP on the printer too via Properties > Protocols > LDAP Server and LDAP User Mappings
TWAIN is a horrible outdated and slow way to scan, and an MFP, unlike a dedicated scanner, is not optimized for it, just setup scanning to go straight to the PC via SMB or FTP using the addressbook.
All your long drawn out scan problems are because you are scanning by TWAIN, just send the scan direct to a folder and be done with it.
As for composite black, it's a check box right in the driver.
