[Jstylezzz]

This is just a guess, but maybe it works when you use a stock function, I've made this real quickly.

pawn Code:

stock GetNPCID(name[])
{
    for(new i=0; i < MAX_PLAYERS; i++)
    {
        if(IsPlayerNPC(i))
        {
            new npcname[MAX_PLAYER_NAME];
            GetPlayerName(i,npcname,MAX_PLAYER_NAME);
            if(strcmp(name,npcname,true) == 0)
            {
            return i;
            }
        }
    }
}

Send the NPC's name to this function, and you'll get the id (not tested).

It would be like

pawn Code:

new npcid = GetNPCID("Zombie");
SetPlayerPos(npcid,x,y,z);

It should work.