Or...you could just cheat like I do. However, I can't seem to optimize it any further than I already have. I also can't seem to find an emulator that can log vgm 1.5. Kega Fusion can only do 1.1.
EDIT: Nevermind. It just seems I'm way behind on the times. I snatched up the newest Gens/GS that can also do patch codes. It doesn't have a cheat search, but I can hack them up in Kega Fusion just fine. I loaded up the Japanese version, and it actually has a tune in the Sega logo that's in PWM. I'm gonna go back and rip the US Credits tune, then go back into the Japanese version and get the missing tracks there. To anyone else wanting to get the credits easily, here's a cheat code.
Races last only 1-Lap, usually ending in 1st place to boot!
FF902C:0004
FF902E:0004
(In Japan version this cheat is even more effective, as most times all you need to do is touch the starting line and you'll win!)

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