How do I move a VPS from one server to another?

You can use the vzmigrate utility for moving a VPS from one server to another. Here is an example of moving VPS #101 to hardware node 192.168.0.1:

vzmigrate -r no 192.168.0.1 101

If VPS #101 already exists on the destination node, you can assign new ID to a VPS using:

vzmigrate -r no 192.168.0.1 101:102

The same can be also done using the Virtuozzo Management Console.