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Hi Toddtastic,
Welcome to the Discussions!
Personally I use a very quick and convenient feature in Disk Utility:
Disk Image Encryption.
It doesn't prevent running the CD or DVD, but there is no way to open any of the files in it without entering a password.
1) Put all your secret files in a folder
2) in Disk Utility, go to menu File > New > Disk Image from Folder...
3) Create an encrypted image of your folder
4) Put the encrypted image on the CD/DVD.
It's this CD/DVD that you now burn, so that its contents will be available only to the password owner.
HTH
Axl