I usually create a temporary duplicate acl & NAT allow/NAT statement that allows my admin access, then remove the other statements and add them back in in the order you want. You will get disconnected, but will be able to get back in because you added the duplicate rule. It is always wise to issue a "reload in xx" statement. I usually use "reload in 10". That way if you really mess it up, it will reload and you will have access again. Just make sure you say "no" to saving the running config when prompted.
I hope this helps.
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