I rebooted and all of it was still in there, still asking to be allowed a registry change. Same three files I got rid of last time. I did another search, on "how to disable Nero Scout" and got this:

http://djlizard.net/2005/12/11/108/

Remove Nero 7's "Nero Scout" from My Computer
Filed Under Fixes, Software, Technical
This does not get rid of the tray icon. This only gets rid of the icon in My Computer. You should be able to right-click on the tray icon and disable that version of scout from there.

Click Start > Run, and type:
regsvr32 /u "%commonprogramfiles%\Ahead\Lib\MediaLibraryNSE.dll"

To undo (put it back) :
regsvr32 "%commonprogramfiles%\Ahead\Lib\MediaLibraryNSE.dll"

This will not cause any harm.

UPDATE: A wiki page has been created, which contains multiple fun DLL registrations, including this one. Check it out and email me if you have any additions (mcooke@DjLizard.net)

My first attempt at this didn't work, it couldn't find the file in that directory. After a search I had to modify the registry line to read

regsvr32 /u "%commonprogramfiles%\Nero\Lib\MediaLibraryNSE.dll"

We shall see.

SRS