Thread: Applying patch

Hi,
I have postgresql version 8.3beta3 running. I want to apply a patch ( gzn7ImULlK3v.gz patch for index-only scan) to this and try it out. How to apply this patch. Where should the patch be placed and what command to be run. Should I have to stop the postgres server or run initdb for the patch to take effect.
This is the first time Im trying out a postgres patch...
Thanks
josh