irule to rewrite header but respond with 200

So this is the requirement from the customer

1. There are currently various "test" domains which are live, such as test.co.uk, test.es, test.com, and so on
2. A set of pages have been created using an application. This application is currently deployed on IP=1.1.1.1
3. This application’s pages will be available as www.ultimatetest.com/www.test.com/p/Pages (with each test domain having its own sub-directory)
4. For this to work successfully, we need the following:
5. ultimatetest.com DNS to point to 1.1.1.1 (where application resides)
6. URL handling rule: All requests to www.test.xx/p/$1 to go to www.ultimatetest.com/www.test.es/p/$1
7. Once this rule is setup, a request for a page www.test.com/p/xxxxx/xxxx will result in a 200 response for the user. This will work using the URL handling rule sending requests ahead without generating a response to the user and the 200 response coming from ultimatetest.com