SCCM - Search all HKCU Profiles on Workstations

Hi Everyone:

This may be a silly question, but I am looking for a way to use SCCM and search all the user profiles on workstations for a registry key.  The registry key is - HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Mozilla Firefox.

I was planning on using the SCCM Configuration Item/Configuration baselines feature.

All thoughts and suggestions are welcome!