Distribution is unlimited, provided indications of the author. By Dmitry Yanchuk 2021. Fly Safely! 
dimayanchuk.98@gmail.com
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OPTIONAL:
A config ini file is included(aircraft configuration). Drop it in: SIMULATOR\PMDG\PMDG 737 NGX\Aircraft 
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The first installation method:
1. Unzip the ptp file (737-800NGX Bees Airline UR-UBA WL.ptp) to any place;
2. Open PMDG Operations Center - Aircraft and Liveries - Livery utilities - Install Livery from PTP;
3. Select the unzipped file. 
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The second installation method:
1. Unpack the Texture.UR-UBA folder to your SIMULATOR\SimObjects\Airplanes\PMDG 737-800NGX WL
2. Open an aircraft.cfg (In the PMDG 737-800NGX WL folder) and add the following text there: 
[fltsim.X]
title=Boeing 737-800NGX Bees Airline UR-UBA WL
sim=B737-800WL
model=
panel=
sound=
texture=UR-UBA
kb_checklists=Boeing737-800_check
kb_reference=Boeing737-800_ref
atc_airline=Bees
atc_id=UR-UBA
atc_flight_number=350
atc_model=737-800
atc_parking_types=GATE,RAMP
atc_type=BOEING
ui_createdby=PMDG
ui_manufacturer=Boeing
ui_type=737-800NGX
ui_typerole=737-800
ui_variation=Bees Airline
airline_name=Bees Airline
description=
visual_damage=0

Where 'X' is the serial number of the livery 