Install dropbox on your PC and iPad. Log in on your iPad and your computer
Open iTunes; click on your books, and highlight everything that you want to put in Bluefire Reader.
Drag all your books to the dropbox on the computer. Open dropbox on your iPad and click on each (I don't think you can select more than one at a time.)
You will get an error "This file tpe can't be viewed", etc. Don't worry about that. Just touch the arrow on the top right hand corner of the iPad app and it will ask where you want to put the file. Choose Bluefire Reader and voila! It's there.
Much better interface, I think.