Create a GRUB2 bootable external harddrive with Ubuntu and Windows 7 setup

1. Create a NTFS boot partition in the beginning of the drive and set the hidden flag.
2. Mount the boot partition.
   sudo mount /dev/sdX1 /mnt
3. Install GRUB2 on the external drive with the root-directory on the NTFS boot partition (needs to be under the 1024 cylinder boundary).
   sudo grub-install --root-directory=/mnt --no-floppy /dev/sdX
4. Edit the grub configuration file.
   gedit /mnt/boot/grub/grub.cfg
   And insert the following Contents:
   menuentry "Ubuntu Live 10.04 32bit"
   {
       loopback loop /ubuntu-10.04-desktop-i386.iso
       linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/ubuntu-10.04-desktop-i386.iso noeject noprompt  quiet splash -- debian-installer/language=de console-setup/layoutcode?=de
       initrd (loop)/casper/initrd.lz
   }
   
   menuentry "Windows 7 x86 Deutsch Setup"
   {
       insmod chain
       chainloader +1
   }
5. Copy the Ubuntu ISO.
   cp [...]/ubuntu-10.04-desktop-i386.iso /mnt
6. Mount the Windows 7 ISO (make sure, there is no cd in the drive).
   sudo mount [...]/de_windows_7_professional_x86_dvd_x15-65812.iso /media/cdrom -o loop
7. Copy the Windows 7 ISO contents.
   cp -r /media/cdrom/* /mnt
8. Umount the ISO and boot partition.
   sudo umount /media/cdrom
   sudo umount /mnt
9. Finished. You can now boot from the external drive or test it with QEMU.
   sudo qemu -m 256 -hda /dev/sdX