No there is not
You must have a PS3 with Playstation store account and purchase it from them with the complete MW3 DLC
Yes MW3 has a PS3 version of the game
No. DLC for any Call of Duty you had to pay money for, and MW3 will continue that way.
Yes. Unless they figure out a way to block rapid fire mods any rapid fire mid will work on mw3.
You don't computer game mods will not work on the PS3 and the PS3 USB port does not go to the games section of the PS3 hdd to allow uploading of games, add ons, or mods
You can get your mods working on MW3 by uninstalling and reinstalling the game.
Sorry Bro There Is No Knife In mw3.
Any version of MW3 is compatible with the COD Elite program. It doesn't matter if you use Xbox 360, PS3, or PC.
The PS3 will not play PC games and PC game Mods will not mod a PS3 game.
Play more and read the wiki on MW3
Various websites. Try typing gta iv mods for ps3,xbox(etc.etc.)
Yes without any optional equipment. All PS3 models play or can play all the games made for the PS3 for the move only games they would need the PS3 updates and Move controller and PS3 eye camera, but neither is required for MW3.