Thank you for your question, Julie.
To the best of my knowledge, a BRF is the only file type that could come out of Braille2000 and then be opened with BrailleBlaster … and even then the file would only open in BrailleBlaster’s Braille Preview tool. To edit a BRF, you could use six-key entry in Braille Zephyr (BrailleBlaster’s “little cousin”).
Can you share more about why you might want to bring Braille2000 files into BrailleBlaster? Maybe we can help you find a solution!
–Kyle
P.S. In case it is interesting, below is information on where I started looking for information online.
The first place I look for information about BrailleBlaster is the program’s website (BrailleBlaster.org).
Next, I look in the archive of the APH BrailleBlaster Discussion Group, on FreeLists.org.