Oracle Database Creation on WindChill DB Server

I have couple of question since i am new to Windchil;

1) It seems like the Solution Installer will create the oracle database for me instead of using my create database script or using DBCA?

2) How can ignore the staging area during the creation of Oracle Database? it is on Database Server why does it need Windchill Third Party Sofware, Datacode and M060 ect in the staging area??

thanks,