[PAYH] How do I point my domain at the PAYH server rather than the ccgi server

[#1]

I have a live site currently on the ccgi servers, with a real domain pointing at it.
I have set up a new version on the PAYH servers which is currently being pointed at by a username.plushost.co.uk domain.
How do I make my real domain point to the PAYH servers once I am ready to to do so after I finish testing the new site?
Do I need to raise a ticket to do this or is it something I can do from inside Plesk?

[#2]

Firstly ...... DO NOT transfer your domain to the PAYH server
This tutorial will take you through it step by step. http://users.plus.net/tutorials/id/69
It works for a single domain as well as multiple domains. It also allows you to test your new site with the domain name while your old site is still live.

[#3]

Hi
Please note on the link given that:
domainname.com._____A_________212.56.83.230
Will depend on the server that you are on.

[#4]

Thanks for the replies.
The link describes pointing the domain without www at the PAYH server IP then at a later stage pointing www at the domain.
So for example: www.example.com -> example.com -> IP of PAYH server.
I don't want to do this I want to point www at the IP _NOT_ the domain.
So then: www.example.com -> IP of PAYH server
I understand how to do this except for the initial part of the explanation where it says:
In the Plesk control panel select "Domain > Domain Alias > Add Domain Alias >".
Enter the 'Domain alias name'. e.g. birdwellfirstresponders.org.uk (this is my domain. it does exist). DO NOT put 'www.' or anything else before the domain name...
If I want to point www. at the PAYH server directly presumably I enter www.example.com as the Domain alias name?
Is that right?

[#5]

you could set up a domain alias as www.domain.co.uk if you wish. but it will also work without the www. which also allows more flexibility in setting up your domain records.