how is the PMDG 737 transfer too fs2004 gonna work?

hi, I was wondering (when fs2004 is released next Tuesday) how users are gonna transfer their pmdg 737 from fs2002 to fs2004 without invalidating their licences and having to ask for a new one? It would be a heck of a job to have to get hundreds if not thousands of users new licence keys without having some users have to wait in a queue for 10 days or more (or maybe less). ;-)AndrewPS. I know thats a little ways off still but Im curious.