DVD clips, frontpage, help Options

[Epic]

hello computer gurus

I'm putting together a presentation on leadership styles and i'm using clips of the show Lost to illustrate my points. What I'm trying to figure out is how I can cut down the clips to just the parts that I want to use instead of the entire scene. I've added video clips to powerpoint before so that's not the problem.

So my questions are:

What program do you recommend that would allow me to take dvd scenes and edit them?

Do you recommend anything other than powerpoint for this kind of a project?

Thanks