Crafty chess book

Does anyone have any experience compiling a book.bin for crafty? If you don't know what this means, then you haven't :P

ftp://ftp.cis.uab.edu/pub/hyatt/documentation/crafty.doc.ascii

To create the file book.bin, you need a PGN game  collection
that is a *real* PGN-compliant file.  Supposing this file is
called "large.pgn" you would use the following command:

book create large.pgn <m> [n] [wpct]

The only thing you have to supply is <m>, a number  indicat-
ing  how  many  moves from each game are to be stored in the
book.bin database.  I typically use  60,  which  stores  the
first  60  moves  from  each  game.   Increasing this number
slightly increases the probability that Crafty will stay  in
book  longer,  but it also increases the probability that it
will follow a game too far, so that it begins to reach posi-
tions  where  the move actually played might not be the best
move, letting it fall into a bad hole.  Increasing this also

increases the size of the database as well.

I convert the PGN, for it takes up too much memory, at least 7 times more than required & as I travel with a Net Book, memory is a must, I avoid Crafty for the moment, too many bugs, but why waste 1ko when the same would be around 150octects? yo!

edit, thx for ze interesting link, yo!