Left domain without setting local account active, need to activate local account

I have a client who had a big network migration from <DomainA> (on SBS 2003) to <DomainB> (multiple Server 2008R2 DCs). One production machine was missed. I tried switching it directly from DomainA to Domain B under My COmputer >>> properties >>> computer name >>> change. I got errors (which I saw on some other XP machines) which I had previously solved with moving the machines to a workgroup, rebooting, then joining DomainB. However, this time I didn't check for an active local user before dropping off of the domain. What's more the system has a software RAID, so my tools like Ultimate Boot CD for Windows can't find a SAM file, and the CLI tool for resetting the Admin password isn't working.

How do I open up this machine so I can put it on the new domain?
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can you log in safe mode and create a new local admin account?

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Technical_EddAuthor Commented:
I'm in. Danke.
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Windows XP

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