Project Web App database name

Question

Hello All,

While installing Project Server I came up to the step to Create Project Web App Instance.  During this step I am to enter the Project Web App database name.  My question is do I enter any name I choose?  Or do I have to enter the Content Database name I created it the steps before.

I am following the below article:

http://technet.microsoft.com/en-us/library/ee662105.aspx

In this article under the section Create a Content Database it says "4. In the Database Name and Authentication section, type the database server name where you plan to deploy your Project Web App databases, and type a name for the database."

Then the next section Create a Project Web App Site step 4 is saying to name the Project Web App database name.  Does this name have to be the same database as above or seperate?

If seperate, why did I have to create the Content Database?

Thanks for any insite...