How can I protect DVDs I create in PE from being copied? I know that I can't prevent 100%, but would like to stop a majority. Can I apply MACROVISION to my DVDs?

Simple answer: no.
Besides there is no point in copy protect, there is always a way to crack the code.

Little trick but not waterproof; add 10 minutes of black video at the end of your movie, burn it to DVD. Now make a little scratch on the DVD at the end of the burned data. This will give cycle redundancy failure.

Silly me - but what is "Cycle redundancy failure" and why would one want to use/do it?

That would be poor man's copy protection, Raymond.

cycle redundancy failure




Optical discs are prone to read errors, particularly when finger prints, fluff, etc. get on the reading surface, so redundant information is added in such a way that minor errors can be corrected. If the disc is damaged sufficiently seriously, e.g. a deep scratch running around a track, the error correction system fails to correct the error, and you will be unable to read that file on a computer by normal means. Note that only the last .VOB file that was scratched would be unreadable.