correct idea to scale out testing environment and test service pack2 installation

Hi

I have a sharepoint 2010 farm it has one sharepoint server, one database server

In one server  below services are running

Central administration service

SharePoint Server Search 
User Profile Service 
Microsoft SharePoint Foundation Web Application

so i want to scale out this form  to

1 application server

1 web front end server

1 Search server (index server)

1 databse server

here how i scale out to this form

1)here how i move  sharepoint  server search service to new  index server and

2) here how i move  Microsoft SharePoint Foundation Web Application to new webfront end server

and in this single server  some web appllications are running also how i move these to new wf server

i want to do like this  because i want to test service pack 2 installation, now  sharepoint version is : service pack1

my actual production environment has

2 application servers

2 webfront end servers

2 index servers

1 databae server

so this correct idea to scale out testing environment and test service pack2 installation

adil