With the packaging tools around now you don't need to worry about what is in the core distribution. In fact, for most applications it is better that Perl is NOT INSTALLED at all on the target machines and the application is packaged using perl2exe, PAR or ActiveStates PerlApp so that you can have a precisely known set of modules distributed as part of your application. I use PaerlApp and I find it very helpful to be able to pack even text files, config files and selected necessary DLL's in the exe that I distribute.
jdtoronto