That’s correct. Novell changed the way the registry entries worked in 6.5 SP1 so that TPH’s could be registered under HKEY_LOCAL_MACHINE.
Here’s the contents of a .reg file from my machine:
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINESOFTWARENovellGroupWiseClientThird Party] "DLL1"="C:\PROGRA~1\Advansys\Formativ\TokenBlocker.dll"
Here’s a link to Novell’s documentation where they discuss the required registry entries, along with the change they made for SP1. Scroll down to the ‘ TPH Interface Requirements’:
I hope this helps.