Applying the GI PSU 2 on a vanilla database is fairly easy. However, patching a standalone database in an Oracle Restart configuration with ASM is a little more challenging. The notes provided in the following link may save you from a sleepless night when your database does not come up after applying the patch.
Good luck, and let me know if you have comments.
Edited by: 846807 on Apr 22, 2012 10:17 PM