[AdamDuerden]

I had this same problem, if you want to make an NPC Spawn with a certain Skin ID, do this, it worked for me.

This is an example of one of my NPC's under 'public OnPlayerSpawn(playerid)'

Код:

public OnPlayerSpawn(playerid)
{
  if(IsPlayerNPC(playerid)) //Checks if the player that just spawned is an NPC.
  {
    new npcname[MAX_PLAYER_NAME];
    GetPlayerName(playerid, npcname, sizeof(npcname)); //Getting the NPC's name.
    if(!strcmp(npcname, "Cashier_One", true))
    {
	  SetPlayerSkin(playerid,76);
      return 1;
    }

I hope this helped!