The PSNee_V** folder contains all the essential files for the project. The PSNee_V.ino** file is the main file of the project, it contains all the basic algorithms of the project. The BIOS_patching.h ...
Programming via ISP can be complex when you're not used to it (I can tell you from personal experience). Apart from the technique I explain in the tutorial, there are a multitude of other ways to use ...