(this is just a post that I'm putting out there, when I Googled for the error I got nothing relevant, so this post is dedicated to the future searcher, whoever you may be...)

The error occured on a brand new install of Windows 2003 Server R2 w/ SP2 slipstreamed.  Oddly, this media set had installed another server without error, but anyway the error was:

Setup library netfxocm20.dll could not be loaded, or function UrtOcmProc could not be found.  Contact your system administrator.  The specific error code is 0x7e:

The solution was to reinstall the "R2 bits" (aka. Disk 2) and reboot.

I'm still looking for a log file or event log message or any clue anyware in the system to indicate why it went bad, but don't like my chances...