There is a instruction CD that comes with the book and a CD/downloadable program that you can buy to change the block sizes...not sure which CD you are getting, but here is the link to the 2nd on I mentioned:
http://www.quiltpro.com/page/Foundat...0_Fab_Mainpage (You can also buy the book/cd w/the other CD as a set on Carol Doak's website)