I did pretty much the same as Leslie. I used one of their templates, and customized it to the colors I wanted. I made my own header and added it as a picture (I have no idea how to do it otherwise) at the top. I have a footer at the bottom that says "Header created using blah blah blah".
In the beginning I would post LO's and the credits, but now I post layouts and link it to a gallery and say that the credits are there.
Speaking of which, I really need to make a new header, and post. It's been like 3 weeks, lol.