To dose--get a bottle of ammonia (it's sold as a cleaner). Add to tank until test results show 1 ppm. The shrimp will add ammonia as well, but not in a controlled fashion--removing the rocks, well, no reason to do that, IMO.
If rock is uncured, it can be used to cycle a tank because there will be dead and dying organisms that will produce ammonia. How much ammonia they will produce varies, and testing to monitor the progress still needs to be done. If the live rock curing process only produces .5 ppm ammonia, the bacteria colonies that develop will be small, and unlikely to support much in the way of fish waste.
If rock is uncured, it can be used to cycle a tank because there will be dead and dying organisms that will produce ammonia. How much ammonia they will produce varies, and testing to monitor the progress still needs to be done. If the live rock curing process only produces .5 ppm ammonia, the bacteria colonies that develop will be small, and unlikely to support much in the way of fish waste.