Here are the time savers for the day, that made me save *lots* of time:
Data::Dumper - My favourite debugging tool.
CGI - Ah... so many useful stuff...
WWW::Mechanize - Wonderful, simply wonderful. And it works!
XML::Simple - OK, this one could be better, but it still helped.
Anyway, these four little tools and some of their friends made it possible for me to create something that would have taken considerably more time without them.