First, I thanks you all for your answers. Step by step what I did. 1. Install from CD1 CentOS mkisofs-2.01.1-5.i386.rpm 2. create the file /tmp/2.6.9-5.0.3.EL.iso 3. run mkbootdisk --device /tmp/2.6.9-5.0.3.EL.iso --iso 2.6.9-5.0.3.EL 4. Burn this ISO image to a CD. That's it!! regards, israel