Princesses

[FactionHeir]

Errrr why should be unpack everything if he only wants to change princesses?

In essence, your post is somewhat correct though. The unpacker is provided in both 1.1 and 1.2 patch. When unpacking, use this as the target line for the unpacker:

C:\Program Files\SEGA\Medieval 2\tools\unpacker\unpacker.exe --source=c:\program files\sega\medieval 2\packs\*.pack --destination=c:\program files\sega\medieval 2\tools\unpacker\ --filter=*.tga

This is based on the assumption of your post where you said your folder is

Program Files/SEGA/Medieval 2

If it varies from that, change the code I posted accordingly.

This code will unpack all tga files, which are of course more than you need, but a lot less than unpacking every file there is!!!
You can just delete the folders you don't want then.

The princess portraits are found in data\ui\CULTURE\portraits\portraits\young\princesses\
Where CULTURE is the culture type (northern_european, southern_european)

You can move that particular folder line over to your main data folder and then edit the portraits using any photo editing program to your liking.

Once done, use io.file_first to run your game.

[ReiseReise]