>I guess nothing makes it entirely unique. They have not control of how they export the data and as you can see they have problems handing their own business. I guess there is no other way then to entirely recreate a whole new process for them in particular?

Just wild guess, but why not copy the table, zap it, append fresh, then bring the notes from the copy - your best guess would only apply to "where do the notes go".

This is just in the lucky case I understood what's really going on here :)