[plt-scheme] plai.plt and drscheme 299.200

I apologize if this has been addressed elsewhere, but is there a version 
of plai.plt that works with 299.200.  The version at 
http://www.cs.brown.edu/~sk/Publications/Books/ProgLangs/plai.plt fails 
to install when it can't find collects/mzlib/private/class-sneaky.ss.  I 
notice Matthew Flatt plans to use this combination in his Programming 
Languages course.  Is it currently working?

Thank You,

Matt
-- 
"You do not really understand something unless you can explain it to 
your grandmother." - Albert Einstein.