Trouble booting opensuse dvd from grub2

Until my Opensuse attempt I succesfully installed popular distros by just booting inside grub 2 and installing to another hard drive/partition.
Can anybody tell me what’s wrong with this entry?
menuentry "Open Suse" --class osuse --class gnu-linux --class gnu --class os {
set isofile="/openSUSE-12.1-DVD-i586.iso"
loopback loop (hd1,msdos2)$isofile
linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile noprompt noeject
initrd (loop)/casper/initrd.lz
}
this is how it looks:
/dev/sda1 XP
/dev/sda2 7
/dev/sda3 LBA
/dev/sda4 swap
/dev/sda5 Mint
/dev/sda6 osx86
/dev/sdb1 hiren’s boot
/dev/sdb2 XUbuntu ==> DVD is here ==> /openSUSE-12.1-DVD-i586.iso
/dev/sdb3 Hopefully OpenSuse
Thanks in advance…
Answer #1
I’m trying “uNetbootin” to see if I can locate the correct linux and initrd files…