change boot label during installation
 

hi all,
I customize my red hat
and create its .iso file
in fact, I edit and replace my changed RPM packages in
main Red Hat .iso file, and change repodata

every thing is OK,
but I want to change boot label during the installation
for example I want to change
welcome message (during the installation)
"welcome to MyName"

can you help me?
thank you :)

also I change the RPM packages needed to change login message
after installation,
but I can not find witch RPM package contains the grub.conf
How can I change this file?