Uninstall MySQL 5 on Mac OS X

I have installed mysql 5 on my mac and now I can't uninstall it or at
least I don't know how to. The reason for the uninstall is I want to
use MySQL 4 (which is already on my Mac...I forgot about it when I
installed MySQL 5).

I'm a newbie when it comes to MySQL and Unix so I'm not sure what to
do. Is there anyone out there that can PLEASEEEEE help me here. I'm so
lost when it comes to all this stuff.

Thanks ahead of time for all the help.