Place the texture folder in the same folder as the respective aircraft variant, then add the following to your aircraft cfg. Do not forget to
increment the X in FLTSIM

[fltsim.0]
title=TFDi Design MD-11F GE UPS N260UP
sim=MD11TFDi_CF6-80C2D1F
model=FGE
panel=
sound=
texture=N260UP
atc_id=N260UP
atc_flight_number=
atc_airline=UPS
atc_parking_codes=UPS
atc_parking_types=
atc_heavy=1
ui_manufacturer=McDonnell Douglas
ui_type=MD-11F
ui_variation=Freighter GE
description=TFDi Design MD-11 \nLivery by Hangar226
ui_typerole=TFDi Design
ui_createdby=TFDi Design