Syntax highlighting of odd language

Could any of you privide some leads in regard to highlighting syntax of an odd language? I have a large amount of snippits of legacy code from our company's primary application. The code used is "BBx" (a variant of Basic). I'm attempting to show this code on a web page, but with highlighting of keywords and variables/numbers. I've already got a list of the language's 250-odd keywords in a file. I saw a "Text_Highlighter" PEAR class, but that seems to only do a bunch of predefined popular languages (ie. SQL, PHP, C). Please don't ruin my Friday afternoon and tell me I'll need to dig into regular expressions..... :) -- Aaron Gould Parts Canada - Web Developer