Ahh so i can install the bootloader app and run keep it should i need to recover the system and then remove all other OS's an install a nice Ubuntu on the remainder of the disk, that right???

What i meant was just that i wanted an to keep UNetbootin on the pc. I was under the impression it NEEDED to have an OS installed, but from your reply i understand that the it can just reside on the disk, on its own.

BTW i presume when installing Ubuntu i can choose to keep the original bootloader??? or do i have to use a specific string on it to keep it?