I am working with the Flywoo F745 GOKU. I got the brand new revision 1.2 that has 1MB of flash instead of the old one that has half of that. I want to put a very simple script to change the LED colors. But I don’t have SCR_ENABLE. This link says that we can create a custom firmware to include LUNA scripting. ( Firmware Limitations on AutoPilot Hardware — Copter documentation
If all you want to do is control LEDs, building custom firmware probably isn’t the answer. Have a look at the NTF* parameters for some built in functionality. Otherwise, maybe a separate controller like a small Arduino could work for you.