Except you still haven't said how it is that you mine a coin directly on zpool.
What d u mean? "c" pass option? RFM

No, that is the coin you want to be PAID in. Not the coin you want to mine. You mine the entire algorithm pool including all coins within and get paid what you have in your c=XXX setting. That's why when you put c=BTC you get PAID in BTC. You can't mine BTC with all the different algorithms.