You can't, the only way is if you're on PC and you use a certain console command.
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If there isn't a download on the store with call of duty, then no. You can play call of duty 3 onwards on the PS3.
Call of Duty classic Call of Duty 4 Modern Warfare Call of Duty World at War Call of Duty Modern Warfare 2 call of duty black ops call of duty modern warfare 3
PS3 with HD
In call of duty, world at war, hold square for ps3 and i think its x for xbox. same as how you get in.
In call of Duty 4 Modern Warfare or Call of Duty Modern Warfare 2 as it is known as "Precision Airstrike" after you get a 5 kill streak you can call it in by pressing Right on the D-Pad