Adding tcl packages to tkkit for use in Tkx

Dear All,

I've tried many times to add Tcl packages to the Tkkit in ActiveState Perl
to use with a standalone Tkx application (built with perlapp). The only
documentation online seems to be the long thread below, which contains some
code snippets and various corrections (but doesn't seem to be complete).
http://www.nntp.perl.org/group/perl.tcltk/2008/11/msg187.html

Can someone post a definitive code snippet that will allow a package that
is installed into Tcl (e.g. pdf4tcl) to be added to the Tkkit.

Thank you for your help.