Moving from one NT domain to another.

We have an interesting problem that I'm hoping somebody on the list has first-hand experience with. We could use some suggestions.

We are going to be moving from one NT domain to another. An account in Domain A, user1 does not have the same SID as the same account name in Domain B, so once you move, you would have to go through and reassign access permissions with the account in Domain B. This would be acceptable to us, but the problem is the same situation occurs for Administrator between the two domains, so we're worried about losing Administrator access to our filer. We would be able to put up with reassigning all user permissions afterward if we could resolve the Administrator problem.

The question is, how do we move a filer from one NT domain to another, and still have Administrator access to it afterward?

Thanks,

-- jeremy