Packages in CentOS

[hiroyosi]

Hi I am trying to install pakages for ispCPOmega in CentOS5.

I followed INSTALL(ispCP ω (OMEGA) HowTo Install for CentOS 5).
But some packages could not be installed.

I tried as follows.

# yum install `cat ./docs/CentOS/centos-packages`

Some packages couldn't be installed as follows.

No package clamav-data available.
No package clamav-lib available.
No package clamav-server available.
No package clamav-update available.
No package cyrus available.
No package perl-SNMP_Session available.
No package perl-Term-ReadPassword available.
No package sasl-gssapi available.

These packages must be installed to use ispCPOmega?