The file bbs-mode.el is a (x)emacs lisp script 
providing highlight syntax for bbi scripts (.bbs)

To use it : 
1) put it into your .emacs or .xemacs folder
2) edit the file init.el of .(x)emacs folder and add the lines :
;; highlight syntax for bbi scripts
(require 'bbs-mode)
(add-to-list 'auto-mode-alist '("\\.bbs\\'" . bbs-mode))