The Phoenix Tool lineage has seen many updates over the years, but the release is widely considered a "Gold Standard" by the modding community (often associated with forums like BIOS-Mods).
The "Phoenix Tool" version 2.73 typically refers to the Phoenix BIOS Modification Tool
: Adding SLIC 2.1 or 2.4 tables into BIOS images to support older Windows operating systems.
: Open the tool and select your original BIOS file.