I know I could research the problem but I find that PerlMonks gives me exactly what I need. Thanks in advance!

See Tutorials, A Guide To Installing Modules

http://kobesearch.cpan.org/dist/Tk

http://cpan.uwinnipeg.ca/htdocs/faqs/ppm.html

http://ppm4.activestate.com/author/SREZIC.html

http://docs.activestate.com/activeperl/5.14/bin/ppm.html

http://www.tkdocs.com/tutorial/onepage.html?langs=perl

Tcl::pTk

How to RTFM