Change in loader or kernel: won't boot with kfreebsd in grub2

[Thomas Mueller]

This is what /cdrom/isolinux/isolinux.cfg shows for Super Grub2 Disk entry:

LABEL grubdisk
MENU LABEL SGD: Super Grub2 Disk
kernel memdisk
append initrd=/bootdisk/grubdisk.img floppy raw

This is from the latest SysRescCD beta.

Now I wonder how or if one can access a CD or DVD from GRUB2.

GRUB2 has (hd0) (hd1) (fd0) but no (cd) or (cd0).

I also wonder how or if one can boot a FreeBSD partition from GRUB2 or syslinux.

Tom