I just got a used G4 tower from my university and was wondering what I have to do in order to upgrade it so I can use it to store and watch videos, pictures, movies, and music. Is it possible to put a 1 TB hard drive in this unit, I've read that I will need a sata pci card to read a drive larger than 128GB but I really have no idea. Also is 128MB the largest video card this can handle? Thanks, any advice would be great