Help - How to rip certain scenes from a DVD

[skhwoody]

this has probably been asked many times before but, i am wanting to rip two scenes out of 'The Office' DVD and convert them to MPEG so that they will play as files within Powerpoint for a presentaiton i wish to do.....

I managed this over 12 months ago but i cannot find the files, program etc i used before, what is the easiest way ??