1) just convert it with buc shotz converter from xbox to ps3, if the filesize is around 140kb itl work but be uneditable if converted back to xbox (by default) if its around 99kb then it will black screen
2) you need to extract the zone first (search for blackstorms zone research in the mw2 hacks and exploits section) follow that tut and the ones online allready (CraigChrist8339) and youll be good