[Kaliber]

Just easy tricks:

PHP код:

//Under OnPlayerConnect always@TOP!
if(IsPlayerNPC(playerid)) return 1;
//Under OnPlayerRequestClass
if(IsPlayerNPC(playerid))
{
    SetSpawnInfo(playerid,0,299,0,0,3,0,0,0,0,0,0,0);
    SpawnPlayer(playerid);
    return 1;
}
//Under OnPlayerSpawn
if(IsPlayerNPC(playerid))
{
    new n[MAX_PLAYER_NAME];
    GetPlayerName(playerid,n,MAX_PLAYER_NAME);
    if(!strcmp(n,"Peter"))
    {
        //For example if Peter spawns:
        SetPlayerSkin(playerid, 69); //Like this number :3
    }
    return 1;
} 


If you do this statements always at the top of these callbacks..nothing can happen with them and they will spawn directly
If you wanna have Zombie NPCs you have to use a Plugin..like FCNPC
Just look at some tutorials how you create them