Once we are done with RCU, start installing OBIEE 11g 64-bit software.
Go to Disk1 ( in my case C:\OBIEE 11g64bit\bishiphome\Disk1\) and Double click on setup.ext file
Click Next
Select “Simple Install” and click Next
Click Next
Select the path where you want to keep your Middle Ware home (e.g. C:\MW_OBI)
Create the user(weblogic is default) and give password, then click Next
Click Next
Give the connection string of the database, BIPLATFORM username and password which we created in the part 1 (RCU)
If you have got Oracle Support account, give that credentials here.
Click Install. Once installation finishes Configuration will start automatically. If you disable windows firewalls, you can go for lunch 
See the task bar for Elapsed Time: (It took around 100 minutes for me)
Click Finish, automatically Persentations server opens in a web browser.
login with the user name and passowrd…you are done.
Please go through the Part-3 to configure for some of the client tool.
…till next time