You must have a PS3 with PlayStation Store account and purchase it from them with the complete MW3 DLC
You can download Mods for Black Ops II on PS3 using Choco's Black Ops II Modding Tool.
You can get mods on black ops 2 for ps3 by downloading Black ops 2 Cheats which contains a number of different hacks, cheats, and mods just in one tool.
Probably
no
as far asi know , you cant download black ops but you can BUY it for ps3 xbox pc and ds hope this helped :))
yes you can
The PS3 will not play PC games and PC game Mods will not mod a PS3 game.
You simply CANT!
don't no ha
You can not do it even with a memory card
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You can either get them directly from the PlayStation Store using your PS3 (free or purchased mods), or you can download them directly from the PlayStation Store online with a PC, transfer them to a Flash Drive or Memory Stick, then load them onto your PS3 from there.
No they could always have viruses or you get get your ps3 banned from going online.