Hi, i have a problem starting Call of Duty from a dvd mount that i created from the original dvd. i have a macbook pro and i dont´t want to carry all these game cds with me. thats the reason for mounting. i created with toast a compressed image (.dmg) from the dvd. then i mounted this image (also with toast). then it appears as a dvd on my desktop. now i try to start CoD, but it does not work. it always wants me to insert the dvd. what did i wrong?