You wrote (in your message from Monday 16)
 > > 	Can anyone confirm if the below works in XFree 3.x?
 > 
 > Me!
 > 
 > It does *not* work there, sorry. The "option" syntax is unknown to the old
 > servers and the values "4 5" are not allowed to be quoted. So someone better
 > put a second, XFree 4.1 specific, entry into Documentation/x on the web
 > server ;-)

For XFree86 3.3.x, the syntax is 

   ZAxisMapping    4 5

in the "Pointer" section of /etc/XF86Config.
-- 
					Matthieu