<reward class="enemy_shot"             base="1"    type="rp" />
   <reward class="enemy_killed_in_explosion"       base="1"    type="rp" />
   <reward class="enemy_stabbed"             base="1"    type="rp" />

   // customize settings
   // (you could copy start_invasion.php to start_my_invasion.php, customize it, and start it instead of the original, too,
   // would avoid losing settings customization when there's an update in this particular file)
   $s = &$metagame->user_settings;

   // e.g.
   /*
   $s->fellow_capacity_factor = 1.05;
   $s->fellow_ai_accuracy_factor = 0.94;
   $s->enemy_capacity_factor = 1.0;
   $s->enemy_ai_accuracy_factor = 0.94;
   $s->xp_factor = 0.27;
   $s->rp_factor = 1.0;
   $s->faction_choice = 0;

   $s->completion_variance_enabled = true;
   $s->friendly_fire = 0;
   $s->initial_xp = 0.0;
   $s->initial_rp = 0.0;
   $s->player_ai_compensation_factor = 1.0;
   $s->player_ai_reduction = 0;
   $s->base_capture_system = "any"; // could be single for backdoor prevention, not really that useful in invasion

   $s->overlay_paths = array();
   */

$s = &$metagame->user_settings;
$s->faction_choice = 2;