Paul sent me this so I could put an Exchange server in to a Lag AD site. It is very cool!
http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/regentry/55956.mspx?mfr=true
Create the following reg key:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesNetlogonParameters
Key: SiteName
DataType: REG_SZ
Value: