Since you state “a bios file” and not specified your motherboard bios i believe you want general guide, the basics…
BIOS Modding: Introduction and Preparations - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum (level1techs.com)
[Guide] Manual AMI UEFI BIOS Modding - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum (level1techs.com)