I have a LiveUSB created with LiveUSB creator which has several versions of PCLOS that boot from that USB stick.
Due to a discussion on the forum about multiboot DVDs I thought it might be nice to be able to have several versions of PCLOS on one ISO.RIDER:
Because my USB has large releases/remasters the result would not fit on a DVD, so the only testing I was able to do is with VirtualBox. Please bear that in mind Procedure:
I copied all the files from the USB Stick partition (not including Lost & Found of course - if present) to a newly created directory at /home/user/multi-os
I then edited the menu.lst file that was copied to reflect the fact I would be using a CD/DVD for the result and not a USB. Not difficult, but necessary.
With that done I ran one command to produce the new multi-os ISO.Command:
mkisofs -R -b boot/grub/stage2_eltorito -no-emul -boot-load-size 4 -boot-info-table -o /media/1.5TB/Multi-OS.iso /home/user/multi-os
where the new ISO was saved to /media/1.5TB/Multi-OS.iso
..... because I did not have sufficient space on my /home/user
The files I copied from USB were in the /home/user/multi-os
The menu.lst stanzas should follow the format for the CD ..... here are some entries for my project ..... I omitted the boot options 'quiet' and 'splash=silent' for my tests so that I could observe as much as possible during the boot .... as you can see the names of the files are those from creating a LiveUSB .....
color black/cyan yellow/cyan
kernel /KDE_Full_Monty_1/vmlinuz livecd=/KDE_Full_Monty_1 root=/dev/rd/3 acpi=on vga=791 vmalloc=256M
kernel /KDE_Aug_2012_Minime_1/vmlinuz livecd=/KDE_Aug_2012_Minime_1 root=/dev/rd/3 acpi=on vga=791 vmalloc=256M
kernel /KDE_Aug_2012_Midi_1/vmlinuz livecd=/KDE_Aug_2012_Midi_1 root=/dev/rd/3 acpi=on vga=791 vmalloc=256M
kernel /test-dual-kernel1/vmlinuz livecd=/test-dual-kernel1 root=/dev/rd/3 acpi=on vga=791 vmalloc=256M
kernel /test-dual-kernel1/vmlinuz2 livecd=/test-dual-kernel1 root=/dev/rd/3 acpi=on vga=791 vmalloc=256M
title Memory Test
It was a pleasant surprise to have the ISO build rather quickly .... considering it was almost 8GB in size.
If I get the inclination I might test this with persistence settings and see what kind of results I get.
I imaging with the right boot option it might be possible to include any persistence present on the USB stick, in the multi-os ISO.
Whether it would work or not of course is another matter
Anyway that's it.
My least stressful way of creating a multi-os PCLOS DVD