No
1. Load the Windows 2003 OS (if slipstreamed with SP1, you need to disable RPC bind time negotiation-query on google to get kb number..takes hotfix and registry entry)
2. Point the new 2003 server to the current DC for preferred DNS
3. Run dcpromo to promote it to a DC (install DNS too)
4. Move FSMO roles to new 2003 DC
5. Make new DC a GC
6. Point 2003 server to itself for primary DNS, and the 2000 DC as alternate (do NOT use 127.0.0.1)
7. Point the 2000 DC to the 2003 DC for preferred DNS, and itself as alternate
8. Re-establish any trusts you have (on both sides) to ensure the TDO (trusted domain object) and the LMHOSTS files are all in tact
9. Adjust DHCP scopes for clients to include the new DC as a DNS server (can be preferred or alternate on clients-recommend alternate to ensure it has more resource availability when its needed)
If you don't do the DNS steps outlined above, expect replication problems.
If you need any more help, just let us know
-Brandon Wilson
MCSE:Security00/03
MCSA:Messaging00
MCSA:Security03
A+