The "Bootable" legacy ISO you've used is in fact not bootable, it relies on CDROM emulation provided by BIOS. VMs don't usually do this sort of emulation. If you set the guest OS to something like ...
Last year I worked on a project to add an OEM-style rescue partition to a computer. Where most OEM installs have a custom program that just rewrites an install image over the top of the partition, in ...