Not a problem, here it is:
1) Backup database
2) Shutdown all instances, using sqlplus or srvctl, depending on
the configuration.
3) Apply patches.
4) Startup database and do the following
sqlplus / as sysdba
@?/rdbms/admin/catbundle psu apply
5) Check the log file for errors and the database for
the invalid objects.
6) Shut down the database
7) Restore the backup.
--
Mladen Gogala
The Oracle Whisperer
http://mgogala.byethost5.com