I work as a computer repair technician and we have every Windows install disk under the sun for when we need to reinstall whatever of the myriad Windows versions the customer in question may happen to have. I have consolidated many of our tools for diagnostic, virus removal, troubleshooting, etc onto a series of flash drives as well as a small Arch Linux partition for when we need to mess with stuff from outside the OS (ie: the Utilman.exe -> cmd.exe trick). I have been trying to find a way, but have yet to make any progress on making a grub menu when booting to the flash drive where I can, in addition to our troubleshooting Linux OS, boot a series of commonly used Windows installation environments.
Does anyone know of any way to boot to a Windows ISO, an extracted version of the ISO, or some specially formatted hacky pre-install environment, that will allow us to basically select an option and start up that installation?