If you've already checked the Strategy Guide, I'm not sure I can be of much help. <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" /> But maybe
this thread will assist, or perhaps you can find an answer at
Desdemona's website...
If this doesn't help you, I'm sure someone more useful will be along soon!
btw, do you have the latest patch installed?
Get patch here if needed. IIRC, one of the bugfixes related to Tax giving the key...
