How can I disable DVD player?

Hi, I bought a MacBook in the States and I am using it in Spain where the DVD zone is different. I want to use Video Lan to watch DVDs, but every time I insert a DVD, the DVD player application opens. In DVD player preferences I have unchecked the "start playing when disk is inserted" box, but when I insert a DVD, it keeps on automatically opening the DVD player.

Suggestions?

Thanks