C:\>instmodsh
Available commands are:
   l            - List all installed modules
   m <module>   - Select a module
   q            - Quit the program
cmd? m CGI
Available commands are:
   f [all|prog|doc]   - List installed files of a given type
   d [all|prog|doc]   - List the directories used by a module
   v                  - Validate the .packlist - check for missing files
   t <tarfile>        - Create a tar archive of the module
   q                  - Quit the module
CGI cmd? f all
all files in CGI are:
   C:\Perl\lib\CGI\Util.pm
   C:\Perl\lib\CGI\Cookie.pm
   C:\Perl\lib\CGI.pm
   C:\Perl\lib\CGI\Push.pm
   C:\Perl\lib\CGI\Pretty.pm
   C:\Perl\lib\CGI\Fast.pm
   C:\Perl\lib\CGI\Carp.pm
   C:\Perl\lib\CGI\Switch.pm
   C:\Perl\lib\CGI\Apache.pm
CGI cmd? q
cmd? q

C:\>

##</code><code>##

perl -MExtUtils::Installed -le "for(ExtUtils::Installed->new()->files('Perl')){print if /\.pm$/}"

or

perl -MExtUtils::Installed -le "for(ExtUtils::Installed->new()->files('Perl')){if(/lib\/(.*?)\.pm$/){$_=$1;s(/)(::);print}}"