How to setup Internet on Openvz container with Private IP

Ok, so i don't want to waste my IP addresses so i would need to setup multiple openvz container with private ip with a single host public ip. If you did read the article on openvz.org about using NAT for container with private IPs, but you were unable to setup properly or your internet isn't going into your container, this is most likely due to a setup issue you have (which is what happen to me and this is why i am writing this up!)