How to change the database in Crystal reports

To give an overview there is one project going on where the oracle database is getting migrated from 10g to 11g.

All the details of database like IP, port etc are changing as part of this.

I can see the driver name configured as crdb_ado (Custom driver).

We have an test environment for 11g against which we have to point all the reports and test it.

Could you please let me know the below queries

1. Where and how to change the IP details in the crystal reports to point to new test and prod databases.
2. Overview on this crdb_ado driver

  Basically the database is getting changed and we want the reports to point and run from the new database.

Thanks