I don't remember where I was in the distro when I created that iso for you. Everything should be on that disk though you might need to install alsa-utils
If you follow the instructions for YUM to use my repository, once you have the first repo file done for zm.repo ( actualy I think I still had the fedora repos configured so you might try the yum install before adding the repo files).
all you have to do is type
yum install alsa-utils
In a cosole window as root type
yum install alsa-utils
Thats it.
You don't have to install them they only allow sound to be played at the server so unless your going to put speakers on your server there is no need. You will find that sound will work on any other machine just fine.
You can also make it so it well not get you that in the options under the tab web you can uncheck the option for ZM_WEB_SOUND_ON_ALARM
That well also make it go away.