For your information the following content has been published on TechNet, specifically of interest how to backup and restore a PWA instance from one server to another (from a development environment to a production environment for instance):

  • Administering backup and recovery for Project Server 2007
  • Back up item-level objects by using Project Web Access
  • Back up Project Server 2007 by using built-in tools
  • Back up Project Server 2007 by using Central Administration
  • Managing the Cube Building Service in Project Server 2007
  • Migrate Project Server 2007 by using built-in tools
  •  Migrate Project Server 2007 by using Central Administration
  • Prepare to back up Project Server 2007
  • Restore item-level objects by using Project Web Access
  • Restore Project Server 2007 by using built-in tools 
  • Restore Project Server 2007 by using Central Administration

And to track newly published content for EPM 2007 you can bookmark this URL.