🚀 go-pugleaf

I've just installed Gnu-chess 4.0-pl74 & I have some questions:

First, I keep getting the message "Book used 129874 of 188000 entries."
which I don't know how to fix (or even if I should fix it),

Second, the Makefile has two options/vars: 
# -Dttblsz=150001 Transposition table size. Small address space computers
#                 might try 8001. Setting ttblsz to 0 removes the transposition
#                 table
# -DBOOKSIZE=250000 Number of unique position/move combinations allowed.
#                   For MSDOS 10000 is used.
Should I change these (I have a 486-66 w/ 20Mb RAM & I'm shooting for the
best possible game; HD space is not a problem)?

I think I need to change something because the HD is accessing way too much
in the course of computer-thinking. Perhaps the hash-table or something is
too big. Wouldn't all of that HD access slow down the thinking process?

Third, shouldn't the computer be thinking on my time as well? Is there an
option for this?

And last, which hueristics should I uncomment in the Makefile for the
best possible play? (which ones do what)

	Please e-mail any answers to: charlton@cs.utexas.edu

						Thanks in advance!
							Charlton