Just a thought... not sure if this would work..
but is there any software that can create another copy of these db files irrespective of the handles present on it.. so that once it copies (say upto 95%), we can use the process you mentioned in the post, and copying the left over 5% shouldn't take much time.
Can we do something like this?
Am just curious if this can be done.
[http://lockhunter.com/ : This completely unlocks and deletes the files]
Is there anything which would copy the file even when there is a lock on it?