Music with video

I am currently working on our thriller soundtrack on Cubase 4 at school and home. I have the main structure and a thorough idea of the sound track but wish to attempt to synchronize it with our actual film footage. Obviously this can only be done when the filming has finished. I can use cubase to do this. And by synchronizing I mean maybe clashes or staccato hits when a head is turned side to side e.t.c.