This isn't as direct as I'd like but if you search for prize money values it turns out they're not protected. I found an elimination event that gave 1900 currency things for 4th place, that seemed unique enough, I searched in more places for a 4 byte code value of 1900 and bingo, 13 found. First one on the list happened to be the prize for that event so I got lucky. After spending the 1.9 million I got and then going back to the races the cheat no longer worked, so cheat as much as you could ever want before switching away (10-20M)
