Yes, hacking any game on PS3 could damage your PS3. Not only physically, but using hacks can get you banned from PSN. Also hacking your PS3 is illegal and can get you in trouble with Sony.
You work for it by killing and doing challenges not hacking.
Yes of course there PS3 game Call of Duty Modern Warfare 2 works in the PS3
No, Modern Warfare 2 on PC doesn't support the PS3 Controller.
No but you can get it for ps3.
Yes
PS3,Xbox 360, and PC.
April 30th for ps3
Call of Duty 3, 4 (Modern Warfare), 5 (World at War) and 6 (Modern Warfare 2) are available on the PS3.Source: Wikipedia
No
there are none!!
Yes Call of Duty 4 Modern Warfare is still out for the PlayStation 3
ps3 modern warfare map pack should definite be out may 5th