Im so sorry…but as you can imagine…the file mod you referred is not my work and i cannot vouch for any modifications done by that user, you should ask that user for further clarifications.
Anyway…i do encourage you to follow the guide here presented by Fernando and try to do the mod yourself as its very easily done.
[HowTo] Get full NVMe Support for all Systems with an AMI UEFI BIOS - Special Topics / NVMe Support for old Systems - Win-Raid Forum (level1techs.com)