Raining code

[kh2k4]

Other than comparing the effect on / off on a single track how could I go about limiting the results? I'm trying to make a code so it rains on all tracks instead of just Tsukuba
http://www.youtube.com/watch?v=h424Nsb5-Sc
it might be hidden away in Tourist Trophey somewhere too since it's just the GT engine recycled.