MP docs re: native threads

I was trying to figure out whether or not LispWorks supports native 
threads on Windows--esp since much of the documentation talks about 
cooperative multiprocessing. I tripped across this note in the 
documentation for notice-fd:

        This function is implemented only on platforms where LispWorks 
processes are not native threads, currently these are Unix/Linux/Mac OS.

That's a pretty subtle place to find such an important piece of info! 
Perhaps the docs could be improved? :-) (And, of course, that leaves open 
the question of whether or not other important bits of info are missing. 
For example--just for example--does process-allow-scheduling do anything 
on Windows...?