I am not very sure what the word 'install' actually means- say there is a movie on the Digit DVD said to be 800MB sized, and I want to see it- there is only one option 'install'- does the whole thing first gets installed on my Hard Disk or can it/ does it run directly from the DVD when I select (click)' install'? Anyone who may clarify this point is requested to do so and oblige. Thanks in advance.