How can I create my own copy-protected DVDs?

I'm giving out a collection of PDFs to some people on DVD, so I'd like to burn them so that they can't make copies (or at least not too easily).

Are there any applications or guides that will help me achieve this?

If each person you give the DVD to has unique data, then you can track illicit copies should they appear. If you let them know this via a notice on the first .PDF, it can deter copying.

You can look into watermarking your .PDF's, or altering each .PDF somehow in a unique manner that ensures each individual has unique data and that you can trace that unique data back to a user. One relatively simple way is to insert a random text or hex string somewhere in each .PDF and cryptographically sign it. Keep the resultant .sig files as a record.