Selecting custom namespace during installation of Infrastructure

Question

I'm performing a new installation of Oracle Application Server Infrastructure and Middle Tier.
I'm uncertain of what I should specify as my namespace during installation.
Some information on my setup (changed names for posting):
Server1:
hostname: vadar.mycompany.com
serving: Application server infrastructure
Server2:
hostname: ginger.mycompany.com
serving: application sesrver middletier (portal)
When installing the infrastructure it gives a suggested namespace of:
dn=com, dn=mycompany, dn=vadar
should i keep the default or change the namespace one level up to just dn=com,dn=mycompany?
I was reading documentation online at:
http://download.oracle.com/docs/cd/B32265_01/install.1014/b32091/infra.htm#BABEBIAE
Which said:
4.16 What Do I Enter in the "Specify Namespace in Internet Directory" Screen?
The distinguished name (DN) that you specify on this screen will be designated as the namespace in Oracle Internet Directory where users and groups are administered.
Select the suggested namespace if it meets your deployment requirements. If not, enter a DN that you want in the custom namespace field. The installer determines the suggested namespace from the /etc/hosts file. See Section 2.11, "The /etc/hosts File".
If you plan to integrate your Oracle Identity Management components with a third-party directory, you should specify the DN of a namespace that matches the DN of the default namespace in the third-party directory. See the Oracle Internet Directory Administrator's Guide for details on integration with third-party directories.
I am also running Active Directory and will be integrating the two. (myad.mycompany.com)
Any input would be greatly appreciated.
Thanks!

Answer 1

If noone really has a suggestion on the selection then can someone pointme in the direction of documentation on changing the namespace after the fact incase the original selection was incorrect?
Thanks ahead of time.