playing a full DVD

I am kinda new at the whole downloading and playing scene. I just downloaded a full DVD movie. I have no problem playing it as I play the .vob files with power DVD. However I was wondering how I would make it so the interactive menus work etc. And I can watch the whole thing constantly. There are also .bup files and ifo files. Is there a program I should use? Thanks in advance.

Dont play the VOB files, play the VIDEO_TS.IFO file