there is sum wack-ass plug ins that do a shitty job.....dont use them.....just animate your camera in C*....I do it lots and am really good at getting realistic camera shakes........
take your camera...its hsould be set at -688.50 in the z axis....move it forward so you have room on the edges to play with, then just animate the camera moves and rotations, make sure your keys are spline and not linear......then just keep touching it up till it looks real.....