It is as easy as this. Go to your incoming call routes, make a route to "VM:ConferenceAutoAttendant"
In the IP Office you make 5 or system short codes that go to Conference Meet Me 1 through 5
In the IP Office you make 5 users that are call forwarded unconditionally to those corresponding 5 System Short Codes. You do this because you can't aim the voicemail PRO at a short code, but you can aim it at a user that is forwarded to a short code.
In the voicemail Pro you start out with a module with the name of your incoming route. Create 5 more modules called Conference Bridge 1 through Conference Bridge 5. Your Auto Attendant will have 1 touch dialing to these other modules
In the voicemail PRO, go to users, create the 5 users that are CFWDed to the Conference Meet Me features
In each of these conference bridge modules you will of course have a start point, than a "check digits", this is your password, than a transfer to your true statement to the users you created previously created.
I insert WAV files into each of these sections asking "please enter your password followed by #