After you have isolated just his face, import it into premiere. Take the shot from the movie and place it in track one in the timeline. Take the “Head Shot” and place it in track two. Put the curser on the still picture and drag the right side until it’s the same length as the video in track one. Make sure the playback point is at the beginning of the clips. Click on the clip in track two to select it. Up in the monitor window select the tab that says “Effect Controls”. Click the arrow in front of the word “Motion”. Click the stopwatch to the left of the “Position” setting. This will create keyframes every time you move the face.
You should now have the face in the middle of the picture in the monitor. In the monitor window drag the face to the correct position. Use the left and right arrow keys to advance the footage frame by frame, or press the space bar to start and stop playback. If you put the face in one position, play the video for a couple of seconds and then put the face in a different place, premiere Pro will put in all the in between frames. This way you don’t have to move it every frame (unless you want to…)
Scott