🚀 go-pugleaf

My thanks to anyone who can advise me with following problems:

We're planning to upgrade our NT4 Domain to Windows 2000
Clients PC's will not be upgraded to W2K in the first place. Clients have
NT4 or Win9x (mostly laptops)

A. Actual situation:
1. NT4 PDC which is also primary Wins Server + DNS server + DHCP server
2. NT4 BDC which is also secondary Wins

B. First planned upgrade action:
1. Install additional NT4 BDC, let it synchronize and then put it offline.
This will act as a backup in vase of trouble
2. Install a new Server with Windows 2000 (which in the end will be the
"primary " or "most important" AD Domain Controller
3. Promote BDC (A2) to PDC and of course demote PDC (A1) to BDC
4. Upgrade new PDC(A2) to Windows 2000 with Active Directory
5. Install AD on the New W2K server (B2) which will sync with the upgraded
PDC/W2K (A2)

The A1 NT4 BDC  will then still host DNS and DHCP etc.
The A1 Server is an old PC and will not be used at the end of the upgrade
process.
We wan't to avoid to perform the actual upgrade on the A1 server, as it also
is a fileserver. If something goes wrong during the upgrade we still need it
to fall back on NT4.
(Afterwards we will migrate to a separate fileserver.)

How should we plan to move DNS and DHCP and Wins (I believe we still need
Wins as we still have Win9x clients)?
Is the only way here the manual reconfig way? Or should we plan this
procedure otherwise?

Untill now we never used a secondary DNS server nor DHCP server. Is it
possible to configure a second DHCP server with the same scopes? Or is it
only possible with different scopes? And what about 2nd DNS?