Have you ever heard DVD ripper? It is a practical tool to put dvd on all kinds of portable players, such as PSP, iPod Classic, iPod Touch, iPod Nano, iPhone (3G), iPhone, Zune, Zune 2, Blackberry, Nokia, Creative Zen, Sony Walkman, iRiver PMP, Archos, PS3, Apple TV, Xbox, iPAQ, Pocket PC, Mobile Phone, etc.
Fortunately, I come across a website which show a lot of dvd tools, for example
Aiseesoft DVD Ripper Aiseesoft DVD Ripper for MacFor other video tools:http://www.aiseesoft.com/