I don't have a bluray drive so i can't run multiman
yes you can. when you go to the options of the game([]on the game) press the one that's on the top right of the options. then press where the game is at(internal/external) and then press triangle on the game and press load. ps3 will do a black screen type of shit(lol) and then hover over the thing ABOVE the install package file, i think its called *App_home/Ps3 or alone them lines. if you need me ill upload a video of what i mean