If you want to create your own handwriting into a font, you can go to www.yourfonts.com and download and print out a PDF template, write your letters in the spaces, and then scan an upload them to the site. Then you'll get a font created from your own handwriting.
You may be able to do something similar using the template and actual fingerprint letter images that have been created with Photoshop too. It may take a bit of time for each of the letters though.