Here is the list I gave Jones back in late 2013 to update OP mod:
I will sort this based on the race type's flag/banner pole to use (like HRM uses the vanilla guard one).
SPACE MARINES
legion_race
data\art\ebps\races\legion_marine\texture_share
lotd_race
data\art\ebps\races\lotd\texture_share
space_wolves_race
data\art\ebps\races\space__wolves\texture_share
thirteenth_company_race
data\Art\EBPs\races\13th_company\texture_share
ultra_marine_race
data\Art\EBPs\races\ultramarines\texture_share
CHAOS SPACE MARINES
death_guard_race
data\Art\EBPs\races\death_guard\texture_share
emperors_children_race
data\art\ebps\races\emperors_children\texture_share
iron_warriors_race
data\Art\EBPs\races\iron_warriors\texture_share
khorne_marine_race
data\art\ebps\races\khorne\texture_share
night_lords_race
Data\art\EBPs\races\night_lords\texture_share
renegade_guard_race
Data\art\ebps\races\renegade_guard\texture_share
IMPERIAL GUARD
firstborn_race
data\art\ebps\races\vostroyan\texture_share
praetorian_race
data\art\EBPs\Races\praetorian\texture_share
ORKS
orka_race
data\art\ebps\races\orka\texture_share
ELDAR
eldar_craftworld_race
data\art\ebps\races\craftworld\texture_share
TAU
tauva_race
data\art\ebps\races\tau_mod\texture_share
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I've added a couple more there from the original request as I don't know if they have been added to OP mod recently (latest download location?)