I have now uploaded a free and very detailed program set to generate the Cahill-Keyes Multi-scale Megamap with borders and one-degree geocell resolution at 1/1,000,000 or smaller scales. It uses the free OpenOffice.org Draw 3.0, and Perl. http://www.genekeyes.com/MEGAMAP-BETA-1/Megamap-Beta-1.html
New users like me can't post images, but check the link herein for many jpegs, pdf's, and free downloads as big as 40 MB.