This cheeky font works by layering the two styles in different colors.
You'll want to first layout the "Base" font, and color it. Once everything's in place, duplicate the text box (place it on a new layer for easier control), change it to the "Letter" font, and change the color. As long as the text boxes stay aligned, you should get a good effect.
If you want to change the text to something different, I recommend using
Free for Personal Use
This fonts are authors' property, and are either shareware, demo versions or public domain. The licence mentioned above the download button is just an indication. Please look at the readme-files in the archives or check the indicated author's website for details, and contact him if in doubt. If no author/licence is indicated that's because we don't have information, that doesn't mean it's free.