I have been extremely cautious in this matter and can only share my approach, to help others as well.
During the development phase, I actually waited to get my self-created workshops branded and trade mark registered before making any industrial pitch. I do not provide any printed material but elected to create a complete multi-media content through almost 645 PPT presentations which I link together considering the demographic profile of the particpants.
All exercises are on-screen and the participants are provided only with Response Sheets which are collected back at the end of the program towards evaluation and feedback . Any specific module is co-branded under any one of my trade-marked umbrella workshops... so Relaxation Skills for Professionals is a subset.
The original open-files and their back-ups are personally monitored by me. And all this on an Apple Macintosh (OS X) with several non-PC variables to prevent smooth running on the more populous Windows...
This may be abundant precaution but I have done all this to protect my rights and also prevent copying. I cannot really prevent anyone from taking notes but since my presentations are rich-multi-media content with audio, video, animation... there is little anyone can do to actually copy and disseminate this stuff under their signature.
Trust this helps :-)