create_group.php

    $new_group = new BP_Groups_Group;

    $new_group->creator_id = 1;
    $new_group->name = 'test';
    $new_group->slug = 'test';
    $new_group->description = 'nothing';
    $new_group->news = 'whatever';
    $new_group->status = 'public';
    $new_group->is_invitation_only = 1;
    $new_group->enable_wire = 1;
    $new_group->enable_forum = 1;
    $new_group->enable_photos = 1;
    $new_group->photos_admin_only = 1;
    $new_group->date_created = current_time('mysql');
    $new_group->total_member_count = 1;
    $new_group->avatar_thumb = 'some kind of path';
    $new_group->avatar_full = 'some kind of path';

    $saved = $new_group -> save();

    if ( $saved ) {
      $id = $new_group->id;
      groups_update_groupmeta( $id, 'total_member_count', 1 );
      groups_update_groupmeta( $id, 'last_activity', time() );
      groups_update_groupmeta( $id, 'theme', 'buddypress' );
      groups_update_groupmeta( $id, 'stylesheet', 'buddypress' );

    } else {
      return false;
    }