project module social network

Hi All
I am new of this group.
Mi question is:
Exist a version of drupal "premodded" with some module for creating a social networking site?
Simple tar.gz with all useful modules for social networking sites.
If not, similar project is a good idea?
I have find some list of module for social network site, but the module list is different from various sites.
I am a bit confusing, with all this list.
Exist a complete and upgraded list (or guide) of modules for drupal 6 (or 5), for start the project of premodded drupal for social network sites?

Any help is apreciated.
Tnx

Livio