Honestly, I think any simple copy protection you can find will stop some people (the casual user as they are often called). As far as looking for something more advanced that people cannot crack, there is no such thing. I don't mean this rude at all, but anything that you could possibly do to a dvd can easily be cracked, and most of the people here can do it. The problem is, the dvd has to be compliant to the standards of dvd so that it will play on the average player, and that really cripples what the options are for copy guard. millions of dollars have been spent trying to develop advanced copy protection for dvd (sony arccos, macrovision ripguard etc) and they were easilly beat. In the case of sony, they were trying to protect their own assets, and in the case of macrovision, they are a company that has specialized in copy protection for many years, and they are easilly beaten by the average user. I really dont mean that rude or unhelpfully to your problem either. the fact is, any simple copy protection will stop someone from just poping it in a computer and copying it, but as far as something advanced that can not be beat? the best their is can easilly be beat by the average user here or by anyone that asks for help.