Tcl and Tcl::Tk modules are available on CPAN at http://search.cpan.org/author/VKON/ as
   Tcl-0.7.tar.gz
and
   TclTk-0.7.tar.gz.

More functions available, less core dumps.

Supported perl versions are 5.005, 5.6.x, 5.8.0
Tested on Win32, cygwin, linux, freebsd

An example that I found interesting is located at http://home.peterstar.net/vkonovalov/tcltk.htm

Courage, the Cowardly Dog