RHEL6 kickstart installation anaconda-ks.cfg files option

All, I am trying to set kickstart installation for RHEL6.1 servers. we use to have RHEL4 and RHEL5 ks.conf file. but during installation process gave error for the configuration options. Can you please let me know best configuration options in ks.conf for RHEL6. I have some software configuration below. # Packages Section %packages editors system-tools mail-server network-server legacy-network-server ftp-server development-tools development-libs admin-tools server-cfg single-node-gfs development additional-devel network-file-system-client server-platform server-platform-devel server-policy virtualization virtualization-client virtualization-platform createrepo bootparamd dhcp dhcpv6 device-mapper-multipath expect grub kernel-xen ntp rsh-server telnet-server tftp-server virt-manager xen sysstat ypserv -nmap -open -xdelta -dovecot -spamassassin

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