I saw a question of SQLBatman about Operations Manager Authoring.
Here my attempt to answer those questions.
Q: Referenced MP could not be found
A: Search on your (Root) Management Server for *.mp files and copy all these files to one directory, like c:\Mps. If your Authoring Console is on another machine then your (Root) Management Server copy these files to this machine.
Q: Create a custom attribute to the SQL DB Engine
A: I only found that there are only two WMI Providers for Microsoft SQL Server 2005: WMI Provider for Configuration Management and WMI Provider for Server Events.
Source: Microsoft Windows PowerShell and SQL Server 2005 WMI Providers – Part 1 and Microsoft Windows PowerShell and SQL Server 2005 WMI Providers - Part 2
I’ve to look for more info about this question, but I at the moment I don’t have much time. But I’ll try to look into this soon.