AsteriskNow ISO or CentOS YUM: which installation method is preferred?

Hello Everybody.
Is it better to set up an Asterisk server using the AsteriskNow iso image or via yum within CentOS that has been installed on a machine? If yum is selected, are there any prerequisite e.g. apache, mysql, etc?
Thanks.
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Save yourself a lot of grief
Save yourself a lot of grief and install a pre-compiled distribution like PBX in a Flash or Orgasmatron. You will also have better support as the configuration will be standardized and the support forums will know exactly how your configuration should be.
Eugene Blanchard
Author of PBX in a Flash for Newbies and Introduction to Data Communications