Can you make factions or cities appear later?

[SSJVegetaTrunks]

I saw this in descr_events...

; emergent_faction - triggers the emergence of the given faction.  This faction must be marked
;	as emergent in descr_strat.txt

Does this mean that I can make a faction show up at a certain time? If so, how do I decide what cities they get?

Also, can I make cities show up later in the game?

By the way, I'm using RTW, not BI.

EDIT: Oh, one more question: How do I choose which portrait a character that starts in the game gets? For example, for Flavius Julius I see this:

character	Flavius Julius, named character, leader, age 47, , x 89, y 82 
traits GoodCommander 2 , NaturalMilitarySkill 1 , GoodDefender 1 , PoliticsSkill 3 , GoodAdministrator 2 , Austere 1 
ancillaries aged_retainer
army
unit		roman generals guard cavalry early				exp 1 armour 0 weapon_lvl 0
unit		roman hastati				exp 1 armour 0 weapon_lvl 0
unit		roman hastati				exp 1 armour 0 weapon_lvl 0
unit		roman triarii				exp 1 armour 0 weapon_lvl 0
unit		roman archer				exp 1 armour 0 weapon_lvl 0

Which of these changes the character portrait?

[Makanyane]

The only way you can have an emergent faction via descr_events is for a horde to appear at an edge of the map like the Slavs in BI. As the nation has to be horde nation you have to run it under BI.exe as RTW.exe won't support hording.
To do it in RTW campaign under BI.exe you also have to internally re-name one of the factions to 'Slavs' (please don't ask why no-one knows!)

You couldn't specify what cities they take except maybe by scripting something for them once they are on???? Pretty sure you can't make cities appear.

Re: the portraits - nothing in strat specifies the portrait, they are automatically assigned by game, but game does seem to always use same sequence at least at the beginning so you need to view portraits, identify the one that gets used for your leader and overwrite that number.tga with the picture you want. (In rtw you'll have to unpack the packs to find them and either put all that factions portraits on the data/ui path or re-pack to get the new one used.)

[SSJVegetaTrunks]

Dangit for both of those! :(