I just got a mac for school and having used PC all my life forgive any ignorances on my part. I am just playing around with it right now and I noticed that some of the video files I have won't play properly in quicktime. I downloaded and installed Periana and that helped kind of. Now all I can watch is the first five seconds of the file. VLC seems to run it fine however in order for me to use the file in Final Cut Express it says I need to be able to run it on quicktime. Short and Sweet - I need a way to expand the codecs (I assume it is a codec problem) of QT/FCE for video editing.