[otrs] Ticket hook

Hello, I was looking for a way to ise different ticket hook names for different queues with no luck. Now i'm facing a problem now to name it maintenance tickets and how to name orders - any ideas? When it isnt possible to use different ticket hooks i should use one Common name for all tickets. At the moment i'm naming tickets as incidents, but a solution is nameing them just "service". At the moment we habe registered about 3000 tickets and the question is: when i rebane ticket hook does the system recognise email as a ticket article or it generates new tiket? Is the identifier hook name, number or both? Any ideas how to rename hook without breaking "the link"? Thank you. With best regards, Raul Orav