I admit that I should probably know the answer to this but I don't. I'm in the process of trying to add some new kickstart files to the first CD of a 4-CD Red Hat distribution. I recursively copied the contents of the CD to a directory, added the new files, and then created an ISO image using mkisofs like so:

Then I right-clicked on the CD icon (GNOME desktop) and selected "Write". The resulting CD is not bootable, even though it appears to be identical to the original CD with the exception of the new kickstart files. Are there some "hidden" files I might be missing? Or perhaps an obscure mkisofs option? Do I need to use mkisofs at all?

Thanks in advance for the help.

Typically what I have done in the past is to use dd to make an exact copy of the CD image, then mount the cd on loopback and add my files. Then unmount it and recreate the CD from that altered image.

Also, instead of right clicking - write, try starting gnomebaker or whichever program you use, load the iso manually and look for boot options before you write.

Just a heads up. "mkisofs" is just a soft link for "genisoimage". I used to use mkisofs to create grub boot CDs. It doesn't work anymore to make a boot CD. At least with any of the options I've tried. Which also means this section of "info grub" needs to be corrected:
---------------------------
3.4 Making a GRUB bootable CD-ROM
=================================

$ mkisofs -R -b boot/grub/stage2_eltorito -no-emul-boot \
-boot-load-size 4 -boot-info-table -o grub.iso iso
---------------------------

Used to work fine. Now it won't. Be interested to see how you solve this.

good luck,

lynnevan