Thanks for the input!
I had a similar situation however the user wanted 2 BB's active simultaneously and to transfer their info to the new device. After using the Device Switch Wizard in Desktop 4.3 I soon found out that the new BB sent it's PIN to all the Blackberry Messenger contacts automatically, leaving the original unit unable to receive messages. I had to delete all contacts in the BB MSGR list on the new device. This sent an update to the BB's on the user's list to delete them. Then I went to the old device, changed the user's name, waited for the info to be sent to the buddy list, then changed it back to the original.
Seems like all contacts were updated and all was fixed.