Hi there,

this mod comes with 25 different real brand liveries for the mule.

Installation:
just open OpenIV and go to: mods/update/x64/dlcpacks/patchday3ng/dlc.rpf/x64/levels/gta5/vehicles.rpf

replace:
mule+hi.ytd
mule.yft
mule.ytd
mule_hi.yft

Final step (this final step is VERY IMPORTANT or you will not get the 25 liveries).
Go to: mods\update\update.rpf\common\data\levels\gta5

search for vehicles.meta and open it.
Now, do a search by pressing ctrl+f and type "mule" (without quotes)
Find the search: mule

Scroll down untill you see the following:
FLAG_BIG FLAG_NO_BOOT FLAG_AVOID_TURNS FLAG_DELIVERY FLAG_EXTRAS_REQUIRE FLAG_PEDS_CAN_STAND_ON_TOP FLAG_BLOCK_FROM_ATTRACTOR_SCENARIO FLAG_INTERIOR_BLOCKED_BY_BOOT

Replace it with:

FLAG_BIG FLAG_NO_BOOT FLAG_AVOID_TURNS FLAG_DELIVERY FLAG_EXTRAS_REQUIRE FLAG_PEDS_CAN_STAND_ON_TOP FLAG_BLOCK_FROM_ATTRACTOR_SCENARIO FLAG_INTERIOR_BLOCKED_BY_BOOT FLAG_HAS_LIVERY

Save the file and have fun : o ).