Okay first you need to download the original file thats made by Hanko: https://www.gta5-mods.com/player/eup-vest-pack

Nest step is knowing what vest the texture is made for... And its easy I'll just tell you the vest number (Its the male vests): Vest1, Steup1

Okay now you need to follow this path: mods-update-x64-dlcpacks-eup-dlc.rpf-x64-eup_componentpeds.rpf-mp_m_freemode_01!

Now you will need to drag the texture to your desk top and then go back to OpenIV search up: task_diff and then choose the task_diff_008_a_uni.ytd and then drag the file from the desktop to the OpenIV thing that just opend up

(Oh you need EUPLO 8.2, EUPMenu_Release_2_2_1_0. And OpenIV)

For more help just ask me on discord:FoxyNick98#5864