Since both Criterion and EA fail till now in providing proper Information for the masses of PC Players out there, (besides some small Twitter bits that came just today after the Update), i decided to spend some minutes of my lifetime to possibly make your life a little easier, by describing on how to access the new Download Content (Legendary Cars, Toys, Boost Specials) and give a little advice on the Installation process with the EADM & the EA Account.
