again some wonderful work with photoshop MeHT well done
as for copyright, it is a very simple law, you do not have to register work for it to be copyrighted, if you created an original work (such as flyers) it is protected by the copyright law, someone cannot use your work for another purpose other then what you inteneded. now the chances of that happening with your flyers are rare, but if you used someones photos in creating you might want to accredit the photographer, other then that you can put the copyright logo and stuff on there without worrying as long as you are giving your work to bike forums.