Is that the one that works only with Lumias?

As peterleinchen said, the package may not be critical but is useful. I myself lived happily without it for months until I wanted to get a whole country map. AFAIK, PC Suite is the only way to do it. But it didn't work. It recognized the phone but refused to talk to it. I scratched my head for a few days, until I figured it out and put this non-critical package back.