720p via Cheat Device in Gran Turismo 4

2
United Kingdom
United Kingdom
I remember reading in GamesMaster magazine that there was a cheat device such as an Action Replay or something that allowed you to run the game in 720p even though that wasn't an in-game option. Does anyone know what cheat device allows you to do that? Does it get rid of the flicker any better than the 1080i in-game option?