in reply to Which Perl version shall I use?

I prefer to use camelbox. The primary advantage of this package his is that Gtk+/Gtk2-Perl is working and up to date. If you have never tried to get (a current version of) Gtk+/Gtk2-Perl working on windows, it can be quite a headache. Installation is as easy as ActivePerl and has the option to install lots of cool extras - like tools needed to compile other libraries.