Install freepbx on running asterisk

I have installed centos and asterisk 1.18,
Now i need to install freepbx, is there any “yum” command or step by step guide?
I have been googling much but none of the steps i found worked for me!!

I did this way coz i need to customize asterisk before installing freepbx.

well, thank you, thank you , thank you :slight_smile: it works !!