SourceOne migration

Hello,

I haven't been able to get an answer from multiple EMC reps and SEs for this question--other than that it's not possible...

I have a SourceOne install hosted on a single Windows 2003 / MS SQL 2005 server. With Windows 2003 Server end-of-life coming, I have to migrate our archived e-mails over to a different server running Windows 2008 R2 / MS SQL 2008. (Additionally the move to MS SQL 2008 is required by the latest versions of SourceOne.)

I have to draft a project plan before I even touch the current installation. I can't find any documentation on the process at all. Anyone have any experience with this type of migration?