I am part of a college business team and we have to make a short presentation in a couple of weeks. I have a Macbook Pro. Now the problem is that the team member who took the video uses a Song DVD-/+R camcorder. Is it possible to break up the file after it was shot because the 8mm DVD-/+ R's can't load in the slot loading drive and I don't have the money to buy an external dvd drive.