What registry entries are read for Add/Remove Programs inventory scanning?

Hi all:

Add Remove Programs information is normally kept under HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall. Under this hive, there is a hive for each product/component installed on the system. Inside each programs' hive, there is a varying number of keys.

I'm using SMP 7.1 SP2. Does anyone know if the Add/Remove Program scan reads all the keys for every product, or if it reads just a set of predefined keys?

Thanks