you might consider taking the entire LaTeX bundle, including a DVI, and the Perl example. (tar-gz compressed)
A very recommended
pocket reference. Actually, I bought the book from amazon. It was $10
And here's the
Tk package itself for a UNIX machine. Even though my Mandrake 7.02 made noises as if Tk was installed, an easy and quick installation of this package got me on the road.