I was wondering if anyone has tried putting the memory seating package on a truck that doesn't have it? Very interested in doing it if possible!!

It appears that it is not possible with nissan parts, as the system is run by the CAN. The bcm would have to be re-flashed to have the option so they could be set using a consult machine.

From service manual:

System Description EIS002M9

The system automatically moves the front seat to facilitate entry/exit to/from the vehicle. The driver seat
control unit can also store the optimum driving positions (front seat, pedal position and door mirror position)
for 2 people. If the front seat is changed, one-touch operation allows changing to the other driving
position.

The settings (ON/OFF) of the automatic sliding seat (Entry/Exiting operation) at entry/exit can be changed
as desired, using the display unit in the center of the instrument panel. The set content is transmitted by
CAN communication, from display unit (without NAVI) or display control unit (with NAVI) to driver seat control
unit.

Using CONSULT-ll, the seat slide amount at entry/exit setting can be changed.