It is not possible to send the 'right' music to the wrong label. A 'hook' is that part of a song that is most memorable. The administration department at a major record label monitors the funds allocated for the recording budget of an artist or band. The label of a demo tape should always have a copyright notice, but contact info does not have to be on the label, because it is usually on the JCard. The best way to find a competent photographer is to look in the yellow pages.
Booking agents are as easy for new artists to get as Managers.
If an artist develops their career successfully, a Manager is usually the first 'team' person to get on board. Most attorneys charge their fees on an hourly basis. As an artist career develops, a business manager is brought on board to handle the money.