For a USB rescue drive that boots a Linux ISO, you would instead write a menu entry that uses the map command to load the ISO image. Detailed examples can be found on many online tutorials.
Are you targeting an or a modern UEFI system ? grubinst-gui.exe download
While grubinst-gui.exe remains highly effective for vintage machines, older multi-boot setups, and DOS utilities, modern PCs rely on the and UEFI standards. If you are working with modern systems, consider these alternatives: For a USB rescue drive that boots a
: Advanced users can toggle flags like "Don't search floppy," "Extra geometry," or "Skip standard MBR" directly from checkboxes. How to Safely Download grubinst-gui.exe While grubinst-gui
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Making a USB stick bootable to run live operating systems, diagnostics, or installation media. Repairing bootloaders when Windows won't start. Download grubinst-gui.exe (Latest Versions)