EBS 11i. Changing apps schema name

Hi,

Long back during 10.7 , we had named our apps schema as apps_fnd.  subsequently , we upgraded to 11i and currently we are in 11.5.10 and planning to upgrade to R12.    As part of this upgrade , we decided to follow the standard apps schema names.    Hence we are changing apps_fnd schema to apps.    We have done the following

Export apps_fnd

import apps_fnd to apps  ( we created apps using create user).

Now my question ,is how to make this apps a registered ebs default schema.       currently in   fnd_oracle_userid, only apps_fnd exists.   How to populate apps schema in fnd_oracle_userid table?