Overview:
1. Stop the Management Service Completely
2. Export ORACLE_HOME as the oracle home of management service
3. Unzip the Patch 5489352 and Start the RunInstaller
4. Select the Option Grid Control Plug-in for Oracle Application 2.0.0.0.0
5. Select the OMS10g Home
6. Specify the Repository Database SYS authentication.
7. Complete the Installation.
Detailed: