I have copied guidance on how to install Oracle DB 10g R2 on RHEL 3 AS (though I am installed it on CentOS 3.6) from Oracle-Base. You can see Oracle 10g R2 install with installation screenshots available on my gallery here. If you to see the updated version you may go to Oracle-Base
Below is my kickstart file to describe you how do I install my CentOS:
# Kickstart file automatically generated by anaconda.
install
lang en_US.UTF-8
langsupport --default en_US.UTF-8 en_US.UTF-8
keyboard us
mouse genericps/2 --device psaux --emulthree
xconfig --card "ATI Mach64" --videoram 8192 --hsync 30-54 --vsync 50-120 --resolution 1024x768 --depth 24 --startxonboot --defaultdesktop gnome
#network --device eth0 --bootproto static --ip 10.10.105.26 --netmask 255.255.255.0 --gateway 10.10.105.2 --nameserver 10.10.105.6 --hostname oradbx
#network --device eth1 --bootproto dhcp --hostname oradbx
#network --device eth2 --bootproto dhcp --hostname oradbx
#rootpw --iscrypted $1$/GVj1uO9$ptIaFnhODKh6bHm5clW.j.
#firewall --disabled
authconfig --enableshadow --enablemd5
timezone Asia/Jakarta
bootloader --location=mbr
# The following is the partition information you requested
# Note that any partitions you deleted are not expressed
# here so unless you clear all partitions first, this is
# not guaranteed to work
#clearpart --linux
#part /boot --fstype ext3 --onpart cciss/c0d0p1
#part swap --onpart cciss/c0d0p2
#part / --fstype ext3 --onpart cciss/c0d0p3
#part /tmp --fstype ext3 --noformat --onpart cciss/c0d0p5
#part /u01 --fstype ext3 --noformat --onpart cciss/c0d0p6
%packages
@ legacy-software-development
@ editors
@ system-tools
@ base-x
@ development-tools
@ printing
@ text-internet
@ x-software-development
@ gnome-desktop
@ dialup
@ admin-tools
@ server-cfg
@ graphical-internet
grub
kernel
kernel-smp