INSTALLATION
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Make sure you have OpenIV:

http://openiv.com/


1) Make a backup of x64e.rpf in the GTA V root directory.

2) In OpenIV, navigate to Gta V > x64e.rpf > levels > gta5 > vehicles.rpf

3) Enable Edit mode, drag and drop jet.ytd and jet+hi.ytd, replacing both files.

4) Close OpenIV, there is no need to rebuild the archive.

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This Texture packs includes :

TAP - Portugal (jet_sign_1.dds, from other upload)
Air Canada (jet_sign_2.dds) (made upon request of @Stephen)
Air Canada Rouge (jet_sign_3.dds)