These could use some documenting (and yes, I know the answer to many) for future use for folks generating PIR. (Hint, hint -- documentation is a good thing)
I will make an attempt at answering all of these regarding how it is today, as opposed to how it should/will be very soon; --- later tonight, that is, when I get back from playing golf =:)
I'm also starting on real IMCC documentation.
-Melvin