Thank you for your post.
FileMaker Server 9 was neither tested nor certified with Windows 2008 Server.
FileMaker Server 10 was tested and certified with Windows 2008 Server R1. Since then, R2 has been released, and no problems have been reported that are attributed solely to R2.
If you are going to move to another server and install FileMaker Server 10, just place your database files in the same directory/folder where the files resided with FileMaker Server 9.
Thank you for the reply. We'll then be upgrading to FMS10. :)