[otrs] Subject depending of the selected queue

Some new features needed for phone tickets (and others also). I need to have a dropdown list of "Subject" depending of the selected queue ("To"). I.E. I have four queues: Windows, IP Phones, LAN and Others. If I select the Windows queue, I want to choose the Subject only between 4 possible choices: Password, Office, Outlook, Install. If I select IP Phone, I want to choose only between Voicemail, Hardware, Configuration. Any idea ? THX for your help.