Hi
I just receive Teibite email.
I'm glad that you figure out.
Anyway, for those who have this doubt, here's the reason and solution:
Party Freak QuickStart package can't have JomSocial Component, extensions and plugins installed since they have all commercial rights and must be purchase on their owners.
The million dollar question is: If JomSocial is not installed, how could we included our Jomsocial theme?
So, after you install the quickstart version, install JomSocial and all his extensions and after this, them you need to copy the "gk_style" that comes inside of "jomsocial theme" folder on rest files package and paste to ../components/com_community/templates/
Now you can go to JomSocial Configuration > Layout and select "gk_style".
Cheers