Hey! Good news for you.
First, not only i am able to create the kickstart cd, I have done what you wanted to do.
I have copied the oracle and my own software files in post section.
This is how you have to do it.
1) use --nochroot with post as follows.
%post --nochroot.
2) mount the cdrom again. as follows
mkdir /tmp/cd (do not use 'cdrom' as it alredy exists)
mount /tmp/cdrom /tmp/cd
3) copy any files you require to from /tmp/cd to the newly made filesystem (/mnt/sysimage)
4) call the copied scripts.
5) unmount cdrom
umount /tmp/cd
Remember the currently available filesystem / , /usr , /etc will disappear after the reboot. So if you copy anything in this file system it will not be available after the reboot.
So copy any/all required files to /mnt/sysimage..... (this is the file system which will come in effect after the first boot. only "/mnt/sysimage" part will be gone)
BTW if you plan to create rpms, it will also be required to put in the comps.xml and the hdlist. So
Hope it helps.
Neerad