Remove subdomain from 2003 Forest

This is how our network was set up...

Main HQ with three branches.  We were going to have the TLD as company.local and then subdomains for each branch including a subdomain for HQ, which would be  We went so far as to create the subdomain on a 2008 R2 box but never wound up using it.  The DC for has been powered off since April 2011.  AD Sites and Services indicates that AD Connections exist between and the TLD DCs as well as the other subdomain DCs.  We want to now remove the subdomain.  I just powered it back on and tried to run the AD replications to it manually using ADSS, which failed.

Since AD replication is failing to, I'm assuming that if I demote the domain controller that AD throughout the entire company will not reflect that the subdomain has been removed.  

Not quite sure where to start here in getting fully removed from my forest, which is in 2003 mode since all 3 TLD DCs are 2003 x64 Enterprise.  Any suggestions?
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Darius GhassemCommented:
Try demoting if this fails then go through a metadata cleanup to remove the data out of AD.
sedberg1Author Commented:
I understand that I would demote the domain controller.  However, the metadata cleanup would be done from where?  We have three DCs on the TLD: AD1, AD2, and AD3.  AD2 hosts all 5 FSMO roles.
Darius GhassemCommented:
From any one of the functioning DCs.
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sedberg1Author Commented:
So I had to force remove AD from the DC since it kept failing at authenticating with the TLD to remove DNS delegation.  The AD connections are still present in ADSS on the TLD.  Should I manually delete those?  Should I do that before or after metadata cleanup?
Darius GhassemCommented:
Do metadata cleanup

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sedberg1Author Commented: do I do metadata cleanup before or after deleting the AD connections?
Darius GhassemCommented:
Just do that metadata cleanup this will remove all lingering objects for this subdomain
sedberg1Author Commented:
The instructions are for removing a domain controller from a domain that includes more than one domain controller.  My issue is that this is a single domain controller in a subdomain.  If I remove the single domain controller, will it automatically remove the subdomain as well?
Darius GhassemCommented:
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Windows Server 2003

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