[ubuntu] Install with only /boot partion on thumb drive

view story

http://ubuntuforums.org – I am trying to setup an older PC (Yes it can boot to USB) with Ubuntu and have only the /boot partition on a USB Thumb drive. Not running the operation system from the USB but to have the OS installed on the internal HDD and only the /boot on the USB Thumb drive, I do not want to run the operating system from the USB Thumb drive. What i would like to do is. plug in the thumb drive and boot the computer and login. If no thumb drive is plugged in when the computer is turned on, it will not boot up due to the lack of a /boot partition. After many attempts I have been able to get it to work, BUT (Hardware)