If you have a standalone HDD Regenerator ISO file, you can use a third-party tool like to create the bootable drive: Download and open Rufus Insert your USB drive; Rufus should detect it automatically. Boot selection and choose your HDD Regenerator ISO file.
Do not attempt to run the "Windows Version" of HDD Regenerator on a drive that won't boot. You need the DOS/Bootable version . hdd regenerator bootable usb iso
Absolutely. After creating the HDD Regenerator USB, you can manually add other .exe files (like HDAT2.EXE) to the root of the USB. Boot into DOS, then type HDAT2 to run the other tool. If you have a standalone HDD Regenerator ISO