Parent-Child domain separation

My company was recently sold and I will be neding to do some Active Directory work.  Our domain is currently a child domain under the previous owner's domain.  I now need to split it and put it under the new companie's domain.  I've never seen this process let alone done it before.  How do I go about handling this task?  Also, I'll be needing to move all mailboxes from that child domain's Exchange 2007 system to the new owner's Exchange 2003 system while keeping the same domain name.  Is that something that is suggested to be done before or after the AD separation and insertion?
X_FilerAsked:
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Jay_Jay70Commented:
you cant simply move a child domain to a new parent domain, it doesnt work like that

You need to build the new child domain in the new forest, and migrate over to it - i outlined a little here a while back
http://www.damaged-existence.com/internet/ActiveDirectoryProcedures/RootForesttoChildDomainMigration/tabid/62/Default.aspx

Its similar to what you want
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