Create Startup disk of RHEL-5

1. cp -a /media/cdrom/isolinux/ /opt/

2. cd /opt

3. mkisofs -o linux-boot.iso -b isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -R -J -v -T isolinux/

4.Burn the resulting ISO image to a CD-ROM or in USB and start booting.

Size of the ISO would be around 15 MB

15M     linux-boot.iso