kickstart ++ installing rpm

[Gregory Machin]

Hi
I'm trying to install an rpm in the %post section of the install using
/bin/rpm -Uvh http://192.168.2.203/devel/courier-imap/courier-imap-4.3.1-1.8.x86_64.rpm.
The web server logs on 192.168.2.203 show that the file/s where
downloaded. but after rebooting the files aren't installed .. this
should work else i have mis read the docs ... Is there a way to view
the %post part of the install process ?