I have two servers and one main domain name to use for nameserver pourpses.

With my registar i have domain.com and

NS1.domain.com = ip on box 1
NS2.domain.com = ip on box 1
NS3.domain.com = ip on box 2
NS4.domain.com = ip on box 2

box 1 uses NS1 and NS2 and box 2 uses NS3 and NS4

is this the recommended way of doing this. And for any clients on say box 2 I tell them to use NS3 and NS4 for their nameservers.

??

thats one way of doing it..

or use the cluster feature in WHM which basicly uses ns1 and ns2 that points to both servers.. so ya dont have to create more name servers

Where can I find out more about this feature in CP ?

loginto WHM and "Configure Cluster"