It's basically the same as making a title for your layouts.. Just create a graphic that is 60x400 in size.. Create the file like you would a normal layout (layer text/grapics, etc). Center the image when printing to the top and center to be sure it will fit correctly on the paper and then print it out using either some heavyer inkjet paper or specialized cardstock.. Should be quite easy to do.. goodluck

PS: here are a few links I found in google:

http://www.crane.com/cranecontent/co...tationery.html

http://www.southworth.com/catalog/pr...roducts_id=234

http://homeschooling.gomilpitas.com/articles/012698.htm