Thanks UncleDuke! I'm on a Mac, so I used a program called Libriate. It's a very bare bones type of program. It only allows me to place a cover and convert a straight .txt file into .lrf. I really am jealous of all the features that BookDesigner has.
I would really like to be able to adjust font sizes and margins, but until I get an intel-mac or they update Libriate this is as much as I can do.