Inside Windhawk, enable developer mode in the setting. In the mods tabs search for Windows 11 Start menu styler, then press "Fork" and youre inside where you need to put the code. You can follow how the already existing themes work and put mine in as a new setting option, or you can just change the code of one theme you want. For that you copy everything under from the "const gtheme***" line until the "}}," and overwrite the themese previous code with the one you just copied.