Help with setting up OpenFire w/ Pandion Instant Messaging (AD vs MySQL)

Hey guys, I’m trying to setup OpenFire to be used with Pandion Instant Messaging. I have a Server 2003 running at the moment with Active Directory. I wanted to see if MySQL would be a better option to use as the database instead of the Active Directory LDAP? Please advised as to which one is easier to setup and maintain. Thank you in advance.