Hasta La Motion!

im brand new to nuke. i’ve watched all hours of the lynda tutorials on nuke however, and searched these forums for my answer before i posted.

what im trying to do (which is so simple it’s not even funny) is take footage we shot, and superimpose a section of a screenshot we took from 1 frame. in the shot, there is a car with it’s hazard lights on, and it’s very distracting. so i took a screenshot of a frame that doesn’t have the yellow hazard lights on, and im trying to get that cropped portion of the car to overlay over the footage. problem 1 is i don’t know how to do that. problem 2 is that the footage was shot on a steady cam, and not a tripod, so there is movement.

any help would be greatly appreciated.