Upgrades from beta or other prerelease versions of DFS Replication Management Pack are not supported. You must delete beta or prerelease version of management pack by using Operations console before you install this version. When you delete a management pack, all the settings and thresholds that’re associated with it’re removed from Operations Manager 2007. Also, .mp or .xml file for that management pack’s deleted from hard disk drive of management server. After you remove beta or prerelease version of management pack, restart Operations Manager health monitoring service on monitored computers. After health monitoring service has started, you’re ready to import new DFS Replication Management Pack and begin monitoring DFS Replication. There’re multiple options when it comes up to importing a management pack. These’re explained on TechNet.