Tk-804.027_500.tar.gz is source, not binary, if you got it from CPAN,
so you would have to compile it first. Portions of Tk are written in
C.
Better is to get an updated installable package from wherever you got
perl.
OK - there is a "ppm install" for 804.028.0.0 available from BdP
Repository (www.bribes.org). But the question remains:
Can I just install 804.028 OVER the existing version 804.027?
--
Fred
Documentation for upgrading a package using ppm is here:
http://docs.activestate.com/activeperl/5.8/faq/ActivePerl-faq2.html#upgrade_package