Oracle DBRefresh from PRD to QAS

Dear All,

I'm performing oracle 10G dbrefresh from Production to Quality server.

Both SAP Servers having it's own schema names like SAPPRD & SAPQAS; instead of SAPSR3 schema name.

Please guide me with steps for dbrefresh.

Note: I have seen in system copy guide, we can't change db schema names while performing homogeneous system copy with dbspecific method.

In this case I need to follow R3load method. Since it's fresh setup with my own db backup.(sap application & db setup with production exports)

Your valuable suggestions are appreciated.

Thanks

Venkat.