I'd be willing to bet that if you cracked open the PCM there are probably spots for other components to be added.
Just look at the mirror switch on the 96 (other years too im sure) it isn't illuminated, but it has all the holes and markings to drop an LED right into. someone actually did it.
same with the infocenter, the board has spots and markings for a switch and something else...obviously this alone wouldn't give me traction control, but I could if I added the other stuff to go with it.
I would be 50/50 that at least one model or type of PCM would have the pins or whatever to enable fuel flow.
on top of which, if you could find some electronics gurus, I'm betting you could build an after market chip to gain those functions.