Unless you add pressure sensors and extra temp sensors you've got no chance.
The Nissan systems don't measure boost at all! They measure airflow and air temp.
Hence why its called a Mass Air Flow system.

EGT also needs extra electronics and AFAIK isn't going to happen with Nissan Consult hardware... It would be easier fitting a new ECU like a GEMS setup to do what you want


There's also ECUTalk for gauges