SBS 2000 Licensing issues - help !

Hello all
Here is my scenario...I have installed SBS 2000 into an existing 2003 AD 
domain. The Active Directory is in 2000 native mode. I made the dumb
mistake 
in assuming I could install the SBS as a member server and install
Exchange 
from the installation binaries on Disk 3. (without the entire SBS package)

All was fine until I got licensing errors as I connected more than 10
people 
to their new mailboxes. 

Does anyone have an intimate knowledge of SBS's licensing architecture? I 
figured it would be OK because there is less than 25 users and I should
have 
50 and used the proper installation keys that came with the software. It 
smells like it's the fact that it (SBS) is not the DC and the other DC 
contains all of the roles (licensing in particular)

My initial thoughts on fixing this issue -
-Make a backup of the MS Exchange Information Store.
-Promote the Win2k member server (SBS 2000) to a DC. 
-Transfer all Operations roles from the other 2003 DC (2000 native mode)
to 
the   SBS.
-Reinstall the (entire) SBS suite.
-Restore the Exchange information store

Would this reset the license database?
Does anyone have any suggestions other than my plan..? MVP's?
Thanks in advance.
--

Regards
Tom