Just add it to the switch like this (change ID to the race ID and TEXTURE to the texture you want):
Code:
switch(GetBaseRace())
{
case VAHSHIR:
npc_type->race = TIGER;
npc_type->size *= 0.8f;
break;
case TROLL:
npc_type->race = ALLIGATOR;
npc_type->size *= 2.5f;
break;
case OGRE:
npc_type->race = BEAR;
npc_type->texture = 3;
npc_type->gender = 2;
break;
case BARBARIAN:
npc_type->race = WOLF;
npc_type->texture = 2;
break;
case IKSAR:
npc_type->race = WOLF;
npc_type->texture = 0;
npc_type->gender = 1;
npc_type->size *= 2.0f;
npc_type->luclinface = 0;
break;
case WOOD_ELF:
npc_type->race = ID;
npc_type->texture = TEXTURE;
break;
default:
npc_type->race = WOLF;
npc_type->texture = 0;
}