have a ps3 with multiman installed. I just tried launching a backup copy of disgaea 3 which I legaly own, and it didn't work, it just gives me a black schreen. I tried both from a pen drive and from the internal HD ( adjusting the setting) I Used the BDemu ( both normal and ermes)because my ps3 blue ray laser is broken and i can't do otherwise. does anyone know if it's disgaea 3 's problem which is incompatible or if i should fix the laser? also would jailbreak solve anything?are there any dangers related to installing it ? does it have different game compatibilities?