I have been on the list for quite some time and find at times it is quite
interesting, although I have never posted before. I have what may seem like
a dumb question, but I'm going to ask it anyway. I have a recent copy of
No serious question is ever dumb.
I can't answer your question in depth, alas, as I don't know how much
you have to modify something before it becomes marketable your own
work (IMHO it's still the original maker's work, just `edited' by
you). But in any event you would probably need to acknowledge the
origins and get permission to use it.