The last time you had plenty of comment or email their questions about the VPS IP add using like? In fact, this very simple, nothing complicated at all.
When you add a new IP into the VPS, it will be similar to the same IP. By accessing this new IP automatically pointing straight to the default folder of VPS
Thus, to use the new IP you need to perform the following tasks:
Check new IP VPS received yet (this is automatically done when you order IP).
Check domain should use certainly has been added to the VPS (using the function 1. Listing Script HocVPS website).
Point your domain to a new IP, and use as normal.