found the problem in battle_models.modeldb
marked in red
Code:
26 transilvanian_peasants_ug1
1 3
74 unit_models/_Units/EE_Peasant_Leather/transilvanian_peasants_ug1_lod0.mesh 121
74 unit_models/_Units/EE_Peasant_Leather/transilvanian_peasants_ug1_lod1.mesh 1225
74 unit_models/_Units/EE_Peasant_Leather/transilvanian_peasants_ug1_lod2.mesh 20000
2
7 hungary
78 unit_models/_Units/EE_Peasant_Leather/textures/mtw2_EE_Peasant_hungary.texture
77 unit_models/_Units/EE_Peasant_Leather/textures/mtw2_EE_Peasant_normal.texture
58 unit_sprites/hungary_Transilvanian_Peasants_ug1_sprite.spr
5 slave
77 unit_models/_Units/EE_Peasant_Leather/textures/mtw2_EE_Peasant_rebels.texture
77 unit_models/_Units/EE_Peasant_Leather/textures/mtw2_EE_Peasant_normal.texture
56 unit_sprites/slave_Transilvanian_Peasants_ug1_sprite.spr
2
7 hungary
68 unit_models/AttachmentSets/Final European Light_hungary_diff.texture
68 unit_models/AttachmentSets/Final European Light_hungary_norm.texture 0
5 slave
66 unit_models/AttachmentSets/Final European Light_slave_diff.texture
66 unit_models/AttachmentSets/Final European Light_slave_norm.texture 0
1
4 None
22 MTW2_Halberd_Secondary 0
1
17 MTW2_Pike_primary 0
16 -0.090000004 0 0 -0.34999999 0.80000001 0.60000002
If you're not afraid of editing the file xD
just replace the two instances of "7 hungary " with "4 merc "
Don't know if is important the space after the faction name but better include it as well.
oh btw this is savegame compatible