Office 2007 Standard Key NTP question on Windows20

I hav configured my major domain controller to sync time with an exterior
time server by editing the Registry as mentioned inside the microsoft content.

I've one additional domain controller that is no longer my major domain
controller that also gets time from an external time resource. ( I believe I did
this by means of net time /setsntp:nameofserver)
Issues:
1. Is there any distinction in utilizing net time /setsntp vs editing the
registry manually? (questioning why microsoft as well as other articles I saw are
rendering it significantly more complex by requiring you to edit the registry?).
two. How do I set my domain controller that is definitely no longer my principal domain
controller to obtain time through the principal domain controller (default
settings) as a substitute for the exterior time source. Have to I edit the registry
settings or just do a net time /setsntp:nameofmynewprimarydomaincontroller??
For this reply I'd prefer to understand what the registry settings will need to for
the default setting about the server.
Instance:
Do I alter
HKLMSYSTEMCurrentControlSetServicesW32TimeParamete rsTypeNTP
back to
HKLMSYSTEMCurrentControlSetServicesW32TimeParamete rsTypeNT5DS
Delete this essential (for some motive the nptserver entry wasn't in my main
domain server so I needed to enter
it)HKLMSYSTEMCurrentControlSetServicesW32TimeParam etersNtpServer
and so forth and so forth.
three. How do I look at my other domain servers and member servers to make sure they
are getting time in the major domain server? When I do a net time
/querysntp,Office 2007 Standard Key, I obtain the existing SNTP value is: time.windows.com,Windows 7 Activation, 0x1. I
assumed the default setting was the other servers synched time using the
PDC.
Many thanks.