1. Extract main.dol/Start.dol (varies by extraction method) from the desired game into the same directory as "main.py"
2. Move your GCT into the same directory as "main.exe"
3. Either run main.exe and input the names of the main.dol/Start.dol, and the GCT, OR drag the main.dol/Start.dol and the GCT onto main.exe and drop them