Sorry I'm late on this reply.
There is absolutely NO REASON WHATSOEVER to implement functions that aren't used by apps and/or drivers. If an app or driver uses an undocumented function, write a test case for it and commit to SVN. Not hard. There is no reason to endanger EXISTING DEVELOPERS because you want to implement some archaic function that nobody except microsoft uses. We DO want this project to survive don't we?
Regards, Richard Campbell