hello everyone,
with the small bootable os disk flooding the internet, can any one suggest me how to create a custom dvd which contains all these iso images and then boot as per our own choice.

yours
anant

Yes and no

Yes you can put Grub on a floppy or a CD (or a DVD if you insist) "unattached" to an operating system to boot any system in a PC, be it a DOS, WIndows, Linux, *BSD or Solaris.

Here is the link

The "no" refer to the fact it isn't an iso image and each system you want to boot must has a boot loader at its root partition. The latter requirement is automatically satisfied whenever you install a DOS, Windows, *BSD and Solaris. For Linux it is one of the option you can choose during its installation.

In a nutshell "yes" such thing exists and I have been using it and couldn't find a PC system that cannot be booted by it.

I am not sure the argument presented by saikee is correct. (oh well .. I am sure it's incorrect)
You don't "NEED" a boot loader on the hard disk or on the root partition of the desired kernel/os/distro.
so yes you can put grub menu in the CD/DVD fs and ask the user to pick one of the "n" kernels you have on the disk.

it does mean you will have to hack to remaster these distro's
I would first try with "mulitple" live CD's, i.e knoppix/suse/mepis/pclinux-os etc. and then only bother

winsnomore,

I know one Linux's boot loader can boot another Linux by calling its kernel (and initrd if applies). The situation I refer to is beyond the boundary of Linux, as I have included DOS, Windows and Solaris in my reply. Linux boot loaders can't call their kernels ( or they may not have one).

Under such circumstance the only method left is to "chainload" the foreign systems. This is effectively equal to asking Grub to boot the boot loader of a foreign system, and passing the control to this foreign boot loader which will proceed to boot its own master.

Thus having a boot loader in root partition will enable Grub to carry out the chainloading operation successfully to any operating system in a PC.