Screencapping Problem

I promise I read the memories before posting this question but I just cannot find an answer. I cannot seem to get my DVD's that I put in my computer to open in Quicktime. I have version 6.5. I would like to use Quicktime because it is the one program I can get to take screencaps. If it is not possible to play DVD's in Quicktime, can someone point me in the direction of a good *cough*free*cough* movie download site?


Thanks,
Anna M