ADMT Help

OK this should be a no brainer… but
I am migrating the user accounts from a NT4 server (PDC) sp6 to Windows 2000 Server. I have established the trusts but here is where I am confused. I am support to now add the “Domain Admins global group from the source (NT4) to the Administrative local group in the Target domain (2k server) and the reverse of this as well.
How do I accomplish this?? What is the actual process. I have all the pages of relevant articles I must be missing a simple step.

The current symptom is below:
Currently when I run the ADMT I revieve a message I am not an administrator on the source domain.