For my Baktrian AAR I'd like to do some moddings:

1) I'd like to change the standard bodyguards to the Baktrioi Hippotoxotai.
I already know how to change the starting bodyguards, but I'd like to change the default ones.
How do I do this?
Is this save-game compatible?

2) I'd like to change the recruitment possibilities voor the Haomavarga province into:
MIC 11:
Level 1: Thureophoroi
Level 2: Baktrioi Hippeis, Baktrioi Hippotoxotai, Hellenic Cataphracts
Level 3: Thorakitai, Promodoi
MIC 24:
Level 1: Saka Foot Archers, Saka Horse Archers
Level 2: Saka Riders
Level 3: Saka Heavy Cavalry
Level 4: Nomadic Noble Mercenary
For people who are curious what I'm going to do; this represents how I am going to roleplay integration of the region in my Baktria campaign. If you've looked well, you'll see it's made for a TypeIII-government. For more details you'll have to wait the development of my AAR.

3) I'd like to make some nomadic ethnicities available for marriage.

4) I'd like to change some city (and possibly province) names during the campaign. How do I do this?