What a handy tool, cheers for putting this up Geoff.
I was wondering what you did to resolve the registry read issue? I don't think it's an issue per-say, but when troubleshooting you'd need to be able to read these keys.
Did you just enable inheritence at the NOVELL\PassSync\Data level on the driver machines and the DC's?
Error occurred while opening the registry key[SOFTWARE\NOVELL\PWFILTER\DATA]. Access is denied.