By the time I got around to booting "backup" discs in that system, it could be done just with a dongle (like a GameShark type thing, maybe? Can't remember) although unlike a soldered-in mod chip, it required booting with any genuine game and quickly swapping to any copy of another game, using a spring to defeat the lid sensor thus avoiding a subsequent check for a genuine disc.

Not quite as convenient, but lack of invasive mod was the tradeoff.