No, it's not possible, but there's no real reason to buy the hardware to play the older versions anyway because each version of the games retains most of the songs.
Also I feel like anything below 15 is unplayable anyway now that I'm so used to having .5 speeds.
It's definitely not because it's "cheaper" to get the new pcb in the cab, it's because if you don't buy the cab with the new PCB, you will not get a new pcb, end of story.
I'm not trying to discourage anything, but you should know that you will have to import this through Japan, the cabinet will cost from 2-5,000 USD and shipping will be around 1,000 to the west coast, since I remember you live in New York add another 500 to get it over there, then add another 500 for customs fees (you have to pay for a broker and taxes).
I spent 3,241.78 but I speak Japanese and so I was able to go through channels which may not be available to you. Also, I live on the west coast, so I didn't have to pay for domestic shipping (I got it at the port with a rental truck) | 
