Just a quick word of advice....if they want to charge you anything, anything at all, from "fees" for their booking services or "agency fees," if they insist you get (and purchase) your head shots from them, if there are any "required" or "standard" fees at all....WALK AWAY.
There are a ton of casting and booking agencies like that which make their money not by booking clients jobs, but by nickle and dimeing their clients to death with fees. If these people want you to pay any kind of fees at all they are a clip joint and not a legitimate agency.
Just a word of warning, lots of people get burned by organizations like this all the time.