I know that this is quite an old thread but after considerable web searching, I think I came across a solution.
1. Open a terminal window.
2. Enter: cd /etc/grub.d
3. Enter: sudo nano 35_boot-isos
4. Launch your favorite web browser and navigate to:
http://blog.snow-crash.org/2010/11/cool-things-with-grub2-and-syslinux---booting-floppy-and-iso-images.html5. Copy the script code from that web site and paste it into your open nano terminal window
6. CTRL-X and save your new file
7. Enter: sudo chmod +x 35_boot-isos
8. Enter: sudo apt-get install syslinux (might already be installed)
9. Enter: sudo cp
/usr/lib/syslinux/memdisk /boot/ 10. Copy your bootable iso files to /boot/images/ (create the directory if it does not already exist.)
11. Enter (into a terminal window): sudo update-grub
12. Reboot and you will find your bootable isos as menu items.
13. If you want them (it) to appear first in menu (default), change the 35 to 06.
Hope this helps someone else.
All credit and glory to
formorer @ http://blog.snow-crash.org/ and of course Kai Hendry of all his work and sharing of the Webconverger!