You will have to set up <a href="http://blog.linuxtoday.com/blog/2009/08/painless-linux.html">separate partitions for each OS</a>. Install them on their partitions and then <a href="http://www.gnu.org/software/grub/">grub</a> around a bit ;) Regards, Paul Whipp Office: 07 3103 2894 Mobile: 0410 545 357 <a href="http://www.paulwhippconsulting.com.au" target="_blank"> Do more business with your website!</a> <a href="http://www.paulwhippconsulting.com.au/" target="_blank">Joomla, Magento, PHP and MySQL web application developer</a> <div class="gmail_quote">On 29 October 2010 09:30, Tom Sparks <<a href="mailto:tom_a_sparks@yahoo.com.au">tom_a_sparks@yahoo.com.au</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> I would like to create a multi-OS usb hard drive these are the OS I am looking at installing on the usb hard drive * Xubuntu live CD * Xubuntu/ubuntu elephel camera / panoram tools (<a href="http://wiki.elphel.com/index.php?title=Elphel_Software_Kit_for_Ubuntu" target="_blank">http://wiki.elphel.com/index.php?title=Elphel_Software_Kit_for_Ubuntu</a>) * KXlight based on Knoppix Debian ( <a href="http://www.amigaforever.com/kxlight/" target="_blank">http://www.amigaforever.com/kxlight/</a>) * AROS (<a href="http://aros.sourceforge.net/" target="_blank">http://aros.sourceforge.net/</a>) I dont know where to start besides downloading the OS's? tom_a_sparks "It's a nerdy thing I like to do" -- ubuntu-au mailing list <a href="mailto:ubuntu-au@lists.ubuntu.com">ubuntu-au@lists.ubuntu.com</a> <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-au" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-au</a> </blockquote></div>