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.

Add this directory to the References in Options
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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.