From ReactOS

• get latest version from svn, get db layout (you need some changes to the _style tables (using roscms as style name instead of prosilver, because we don't have the default path in out sources))
• assure it runs and works like expected
• run update script from phpBB homepage
  • within the database update make sure your user has enough rights to modify the database layout
  • resolve manual conflicts
  • take a look at: http://svn.reactos.org/svn/web?view=rev&revision=232 for most important changes for our codebase
• check your local copy if everything went fine
  • sometimes you have to run the database_update.php script yourself again
  • be sure auth_roscms.php is the only auth plugin
  • be sure the logout works (it's a redirect to roscms logout)
  • be sure login redirects to roscms
  • be sure registration only works with roscms
• commit changes
• checkout on webserver and run update script again to get the changes for database layout into the production system