I supose you know there must be a Autorun.inf file at the root of your CD. This is a text file. In your case, it must be:

[autorun]
OPEN=BPlay.exe "brother.bsi"
ICON=BPlay.exe

The "ICON=BPlay.exe" is optional.

You can also rename brother.bsi as bsplayer.ini, and it'll be loaded automaticaly when BSPlayer starts, so Autorun.inf would be in this case:

[autorun]
OPEN=BPlay.exe
ICON=BPlay.exe