2 questions

[Fluvius Camillus]

[..]Taking a similar case for example: Makedon has homeland resource in two provinces north of Pella, however they can't train good quality phalangites there, however these provinces enable you to train Thraikioi Rhomphaiaphoroi (Elite Thracian Infantry) with the right regional baracks. These guys are wery usefull since they are great warriors with long AP (armour piercing) "swords" and can kill all kinds of enemies really fast (from Hellenes to Romans). Thereofre it would be better for Makedon to keep a type III govermnet in there for the better troops.[..]

Sorry if this ruins your example but aren't the Rhomps factional as Makedonia? (Correct me if Im wrong. I recall this from my pre1.0 Mak campaign...).

Ah yes, Taras :). I gave that to the Romans in my first turn in return for a ceasefire and trade rights.

Eventually you will have to take it back...

[ ..] But what are the regional barracks? The Conscription center of the army (red one) or The Conscription center of the army for foreign natives (orange one)? The way I see it the red one gives you your "normal troops" (if available, so for me its hoplites and stuff) and the orange one gives you the troops from that region (celtic for example).
But when you build a type III or IV governement, whats the use of the red barracks? You cant train those troops anyway :P[..]

Red = Factional (or native, but that confuses me a lot)
Orange = Regional (also usually the last building you can choose from in the building selection.

You can build:

Type I
Factional to level 5
Regional to level 2

Type II
Factional to 4
Regional to 3

Type III
Factional to 3
Regional to 4

Type IV
Factional to 2
Regional to 5

There are some exceptions around, but this is usually the system for all factions except nomad.

Hope this helps.

~Fluvius