*Splitting this topic off into it's own thread for you...*
The p28 will not work correctly on the hx's d16y5. I'm sorry you were mis-led and bought all that stuff that probably won't work as you are expecting it to do.
vtec-e is not the same as vtec. The hx lobe switching is an entirely different process from a standard vtec pattern. The D16y5 cam has 5 lobes where as the d16z6 and d16y8 have only 4.
There's a mid range power gap that be very apparent if those secondary lobes are not opened up and pretty much only the hx ecu has that functionality to do so.
Additionally, the p28 will not support the wide-band o2 sensor your car has. you'll need to re-wire that to run as a 4-wire instead of 5 wire.
So, you likely want to retain the hx computer with the hx motor. There are obd2b variants of it in manual form. I'm not sure if there is an immobilizer in there or not, but it not, it is likely your best option.
At this point, i would suggest just doing a full d16y8 changeover with the auto-manual change in play as well. These are cheap, under 500 bucks these days and you can use the p28/harness that you have already to run it with a few minor wiring changes. The rest of it will likely plug right in.
Otherwise, you're going to spend a couple hundred bucks trying to make what you have work and still be slower. the cost/benefit just isn't there, plus you can sell the hx motor for 100 bucks or something (not in high demand)