Tutorial Request

Well, go to missions/encounters. There are many of them, make new encounter.ini, and make it the way yo want(look in those that are already there.

[EncounterFormation]
ship_by_class = 1, 1, sc_fighters <--numbers 1,1 -max and min. ships
pilot_job = assault_leader_job
make_class = wanderer
ship_by_class = 1, 2, sc_fighters, -1 <--- -1 means their level is 1 lower
pilot_job = assault_job
make_class = wanderer
formation_by_class = fighters <---formations from formations.ini and factionprops.ini
behavior = wander
arrival = all, -object_jump_gate, -tradelane
allow_simultaneous_creation = yes
zone_creation_distance = 0
times_to_create = infinite

[EncounterFormation]
ship_by_class = 1, 1, sc_fighters
pilot_job = assault_leader_job
make_class = wanderer
ship_by_class = 1, 2, sc_fighters, -1
pilot_job = assault_job
make_class = wanderer
formation_by_class = fighters
behavior = wander
arrival = all, -object_jump_gate, -tradelane
allow_simultaneous_creation = yes
zone_creation_distance = 0
times_to_create = infinite

[Creation]
permutation = 0, 3
permutation = 1, 1

Few words on permutation(figured out by Devastator):
number 3 relates to the first encounterformation
Number 1 -second.
These number reflect the spawning possibility of enc.formation.
This case 1 formation happens in 75% of encounters(3/4), you got the idea here.
This numbers could also be 0, 300 and 1, 100 = the same result(300/400 = 75%) Use any numbers here.

First numbers correspond to formation in the file

[Creation]
permutation = 0, 3 <---0 here for for the 1 formation.
permutation = 1, 1 <--1 here for the second formation.
You can add here permutation = 2, 1 if you add 3rd formation.
Chances of the 3rd formation will be 1/(3+1+1) = 1/5 = 20%.
That's for short.
See the link:
<!-- m --><a class="postlink" href="http://the-starport.net/index.php?option=com_docman&task=doc_download&gid=56&Itemid=43">http://the-starport.net/index.php?optio ... &Itemid=43</a><!-- m --> - may help
See "understand-encounters by Buck Danny"