As you've seen, how-to topics are stored in the Additional How To Content folder. To distribute the how-to topics you've created, all you have to do is make copies of the files you added to that folder. Then you can e-mail the copies to other people or store them on a server for later downloading by others. Anyone who wants to use your how-to topics must store them in the Additional How To Content folder on their own computers and then restart Photoshop if needed. Remember to bring along any linked images you may have used.