For windows 2003 Server is:

HKEY_CLASSES_ROOT\Installer\Features\9040111900063 D11C8EF10054038389C

look for the WISPFiles and WISPHidden

not:

HKEY_CLASSES_ROOT\Installer\Features\7040110900063 D11C8EF10054038389C\WISPFiles
HKEY_CLASSES_ROOT\Installer\Features\7040110900063 D11C8EF10054038389C\WISPHidden


Also this:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Installer\UserData\S-1-5-18\Products\9040111900063D11C8EF10054038389C

instead of this:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Installer\UserData\S-1-5-18\Products\7040110900063D11C8EF10054038389C\Featu res\WISPFiles
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Installer\UserData\S-1-5-18\Products\7040110900063D11C8EF10054038389C\Featu res\WISPHidden



Just a little helpful tip.

Thanks for this info!!!