I’ve put together a small python script to make it easier to install DUET. If you don’t already know what that is, DUET is a BIOS bootloader that implements a UEFI interface. DUETi doesn’t actually include DUET, you’ll still need to download it from the other post on this forum or use one of the hackintosh bootloaders that include DUET. The DUET REFIND download comes with an installer for DUET and REFIND, but it only runs on windows and limits the devices you can install to. DUETi works on all modern desktop operating systems, and operates on whatever you point it at, whether that be a system drive, raw disk image, or loop device. There are no safety checks in place, so if you don’t know anything about partition tables, wait for the GUI release. The script and technical details are at GitHub - sugoidogo/DUETi: cross platform DUET Installer
Finally got around to updating this. DUETi can now also pull the latest release of clover/opencore, as well as the EDK builds of DUET+REFIND from these forums. The optional flags allow you to provide any github repo or direct download url as a source, change the regex used to identify the chainloader files, and install the mbr and pbr chainloaders in one go.