I am totally unexpert but, as nobody posted the right answer yet, I try and help. Your OpenACS install should be somewhere inside you disk. Also, there should be some command in your system which performs a search for a given expression and tells you the location of such an expression. Such Linux commands have strange names to me, I do not know which one is to be used, but some command of the kind should exist. Also, I guess, you know the text you want to change.
Would it be useful to try a search for some particular string of text within the whole OpenAcs install?
Maybe.
