Braille Blaster will open a NIMAS file (.xml) and allow you to format and translate. Duxbury will not open a large NIMAS (xml) file. Duxbury created NIMPRO which is their pre-processor for NIMAS files and works in tandem with DBT and WORD swift add-in.
Both translation software programs, DBT and Braille Blaster, will allow you to divide large textbooks into workable volumes.
For training with Braille Blaster I would contact the American Printing House for the Blind. I would google search APH Braille Blaster. They have a link to sign up for training. For NIMPRO/DBT training you should contact Duxbury Support.