As far as I know, that is "unpublished" information. You may find a few of
the registry entries documented, but only a few. Vendors generally don't
publish information that is, strictly speaking, not _needed_ by users and
which _might_ change from software release to software release (and thus
cause them troubles when it is used by users and the user's tweak no longer
works when a new release comes out).
The Access System Tables, too, are "undocumented", for similar reasons. Some
people, in the past, have dug into them and used them for various purposes.
However, I believe there were System Table changes (sometimes as drastic as
deleting or adding a new System Table) in every release of Access, so far.
Larry Linson
Microsoft Access MVP