Installing Pmw on windows (Tkinter book useless?)

[doyen at mediaone.net]

I'm trying to use Grayson's Tinkter book and it requires Pmw. I got the
.tar file, and my WinZip seems to recognize it, but give me an invalid
head message when I try to unzip it.
Anyone else had this problem?, Does it mean my $50 book is useless? I
spent hours looking through the book before I even found a reference to
getting Pmw (pg 376 tiny little asterisk at bottom of page).

doyen at mediaone.net