I do the oracle Silent installation all the time. To get you started here are the steps in brief

- preparation
a. get the software unbundled
b. create oratab and oraInst.loc file under /etc
c. create user and groups for oracle
d. make sure you have OS prereqisite rpms installed.

- here is the sample responsefile
[General]
RESPONSEFILE_VERSION=1.7.0
[SESSION]
UNIX_GROUP_NAME="oinstall"
FROM_LOCATION="/orasoftware/oracle/Disk1/stage/products.jar"
ORACLE_HOME="/export/app/oracle/product/9.2.0"
ORACLE_HOME_NAME="OHOME1"
TOPLEVEL_COMPONENT={"oracle.server","9.2.0.4.0"}
DEINSTALL_LIST={"oracle.server","9.2.0.4.0"}
SHOW_SPLASH_SCREEN=false
SHOW_WELCOME_PAGE=false
SHOW_COMPONENT_LOCATIONS_PAGE=false
SHOW_CUSTOM_TREE_PAGE=false
SHOW_SUMMARY_PAGE=false
SHOW_INSTALL_PROGRESS_PAGE=false
SHOW_REQUIRED_CONFIG_TOOL_PAGE=false
SHOW_OPTIONAL_CONFIG_TOOL_PAGE=false
SHOW_RELEASE_NOTES=false
SHOW_ROOTSH_CONFIRMATION=false
SHOW_END_SESSION_PAGE=false
SHOW_EXIT_CONFIRMATION=false
NEXT_SESSION=false
NEXT_SESSION_ON_FAIL=false
SHOW_DEINSTALL_CONFIRMATION=false
SHOW_DEINSTALL_PROGRESS=false
[oracle.server_9.2.0.4.0]
COMPONENT_LANGUAGES={"en"}
INSTALL_TYPE="EE"

-- change list line content to SE for standard edition

-- fireup the cmd
./runInstaller -silent -responseFile oracleresponsefile.rsp

-- you will need patch 3006854 to get it working on RH ES 3.0

let me know if you need full document i have written on it.