The very best advice I can give u, that will save u tons of work, and then potential problems when u do this swap is BUY THIS:

http://www.rywire.com/dxtodvtec.shtml

Or atleast wire up the MPFI, get a Si harness, and buy this:

http://www.rywire.com/sitodvtec.shtml

And one more thing to consider, when doing an MPFI, if your swapping, u can wire it all up, and u dont need to add the injector resistor box if your swapping in an OBD1 car and going OBD1... Im not sure exactly how that works out, ive never done DPFI to MPFI swap... But I have heard that u can use OBD1 injectors with a PM6 (CRX Si) ECU if u bypass the injector resistor box... And when u convert to OBD1 this is one less thing u have to worry about...