Unfortunately,
there is no easy way (unless someone implemented one
while I wasn't looking) of downloading all the documentation
developed on meta (or the other set which seems to have sprung up
on
mediawiki.org). (I guess we could really do with an
export-by-namespace option, which would work if we moved the
relevant templates from their current Template:h* home...)
The best you can do, I think, is get (or make) a list of all the
pages you want, use Special:Export to plonk them all in an XML
file, and then Special:Import (that does work now, right folks?) to
shove them in your own wiki. I make no guarantees about the
technical or legal validity of these instructions, but it oughta
work...