Transferring DNS zones from 1 server to another

Hello,

My program needs to move a bundle (hundreds) of DNS zones (not AD
integrated) from one server Windows 2003 server to another.
I do this by exporting/importing registry values:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DNS
Server\Zones and copying the corresponding zone files.
After importing I perform restart of DNS server service.

The problem is that DNS didn’t “see” these zones not via DNS MMC nor for
answering DNS queries.
I can’t point out exactly when it loads the zone information, but after
playing with the service a long time (restarting it and creating DNS zones
manually thru DNS MMC), it starts to see my imported zones.
What is the way to make DNS server service to load imported zones during the
first service restart?

P.S. My destination server generally has no any DNS zones before the import.
Restarting of machine impossible.