Warning
The Advanced BIOS menu can brick your system, use at your own risk
The files in here are precisely what got me into Advanced BIOS when booting from a usb containing these files on it specifically (which I just copy-pasted from my Linux environment, should work that way from Windows as well).
Some files may be redundant or unnecessary, but this produced the advanced BIOS menu in the UEFI exactly as intended and without doubling the "Advanced" menu item in "More Settings" or rendering an unusable UI as other SREP configurations/bundles did. If you know that some elements contained here are suboptimal or unnecessary, feel free to submit pull requests or even just drop an issue informing me of such and I will happily modify the files and build the resulting image accordingly.
Note
For a bootable ISO you can burn in whatever way you do that (I use Linux and am competent with the terminal so I use dd if=/dev/sdX of=/path/to/iso.iso to burn ISOs to flashdrives, try balena-etcher or rufus if you are not comfortable with such) check the releases
Tested On: - Lenovo Legion Pro 5 16irx9, most recent BIOS version as of Janurary 2025 (also worked on August 2024 BIOS)
If these settings work on your model, drop an issue so I can add them to the README for others with your model to know they worked (or didn't work).