There is no magic button in cPanel that can do any of this for you, so if you're not familiar with BIND and have no desire to learn then you probably shouldn't touch your zone files at all.too technical did not understand
Something like this?I did a research and came accross DNS Failover
http://www.google.com/search?hl=en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=dns+failover&spell=1
Need more research