You may use any of my creations in any way or form you wish. You may modify them, use them in your blogs, websites, projects, for CD/books covers, whatever.
You may pretend they are yours. You may sell them or whatever. I couldn't care less.
You have my permission for everything you can think off regarding my work. Every file is downloadable in original size. No link backs, credit or copyright notes, mentioning of my name or nickname is required.