[CentOS] Upgrade mode with kickstart

Helllo,
 
I'll like to add rpms during a upgrade with kickstart installation.
I specified the name of rpm in "%package" section but the rpm isn't
installed.
This feature isn't supported with CentOS 4.4 ?
 
 
# Kickstart 
upgrade
# Reboot after install
reboot
#cdrom
lang en_US.UTF-8
langsupport --default=en_US.UTF-8 en_US.UTF-8
.....
%packages
vsftpd
...
 
Thanks in advance,

Denis MACHARD
 
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