When discussing creativity and or being creative, my mind goes back to college and one of the last classes I took. The professor was writing a book on creativity and was of the opinion that you could teach businesses how to be creative. My profs idea of creativity was turning his briefcase in a different direction on his car seat so he would remember to do something on the way home. The creativity was in coming up with a good trigger to remember to do something.
My understanding of creativity is a little different. I believe that while you can force a team or individual to come up with a better idea using some wonky techniques, a true creative puts out an idea well before it's time or is able to define a whole new way of doing something that no one has thought of before.
Brain hacking is figuring out a trigger that will lead to a different result. Creativity is crafting or thinking up something new without any prompting. While you can help someone be more "creative" it really is hacking their brain to do something they may not normally be inclined to do or figure out.