Place the "texture.NationWide_*" folder in the "QualityWings Avro RJ85" folder. Add the following lines to your aircraft.cfg file. Replace XX with the next numbers in sequence.

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[fltsim.XX]
title=QWSim Avro RJ85 - NationWide Express ZS-CAL - Config: Stair R1
sim=QWRJ85
model=RJ85
panel=RJ_HD
sound=
texture=NationWide_CAL
checklists=
ui_manufacturer=British Aerospace-QWSim
ui_type=Avro RJ85
ui_variation=NationWide Express ZS-CAL
atc_heavy=0
atc_id=ZS-CAL
atc_airline=
atc_flight=
atc_type=BRITISHAEROSPACE
atc_model=BA46
atc_parking_codes=SAS
atc_parking_types=GATE, RAMP
visual_damage=0
atc_id_color=0000000000
description=Repaint by Calvin Diogo/CharlieDelta Textures.\n\nQualityWings Avro RJ85\n\nModel: Lars Roennig\nVirtual Cockpit: Jacob Kubique & Lars Roennig\nGauges: Ernie Alston\nMaster Textures: Samy Fay\nFDE: Nick Peterson\nSounds: Emil Serafino Jr

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