well.. you may have a small problem. Some d15b's didnt come with vtec pressure switches. So youll have to wire one up seperately. Heres a pic of what a normal vtec selenoid and pressure switch look like....
Now the next pic. is what some d15b's look like without the pressure switch. Now you can install and wire up the pressure switch where the red arrow is pointing to the bolt. Remove that bolt and install a pressure switch there. Youll then have to run a wire to pinout D6 on your ecu. I have included a diagram for you.
here is the wiring diagram
HOPE THIS HELPS!! GOOD LUCK