Yes, you need to install:
- Tcl/Tk, probably best fit could be binaries ActiveTCL from www.activestate.com
- CPAN module Tcl; it will connect to Tcl/Tk; this module requires compiling (its not pure-perl), I can assist you on this
- CPAN module Tcl::Tk; it will provide a syntax very similar to perl/Tk; this module is pure-perl
All in all, once you'll solve installation task, you'll get much more flexible and larger widget set (compared to perl/Tk)
Also, Tcl::Tk has user's mailing list (tcltk at perl.org), so feel free to write there...