Installation is split into each of the 4 folders/files, all of which can be found in the "The Pale Waves Alesso Heist Overhaul Pack" folder you download from this page:

1. HEIST NAME CHANGER

Copy the folder named "The Pale Waves Heist" into your MODS folder - NOT OVERRIDES! This will change the name/briefings for the heist. When finished, your folder should appear in your directory as such: C:\Program Files (x86)\Steam\steamapps\common\PAYDAY 2/mods/The Pale Waves Heist

2. HEIST TEXTURE CHANGES

Copy the folder named "Pale Waves Concert" into your mod overrides folder, this will change all of the textures in the heist to images of Pale Waves band members/logos/merch. The file directory should look like this: C:\Program Files (x86)\Steam\steamapps\common\PAYDAY 2/assets/mod_overrides/Pale Waves Concert

3. HEIST VIDEO CHANGE

Copy the folder named "Pale Waves Jealousy Alesso Video" into your mod overrides folder, this will change the video played on the main stage to the music video for Jealousy. The file directory should look like this: C:\Program Files (x86)\Steam\steamapps\common\PAYDAY 2/assets/mod_overrides/Pale Waves Jealousy Alesso Video

4. HEIST LOADING SCREEN CHANGE

As stated, this one is optional since it requires installation of Coloured Loading Screens, and so if you don't have/want to install this mod, you can ignore this part of the installation! If you have installed CLS, take the "job_alesso.texture" file in the ZIP (it should be loose alongside the other 3 folders) and replace the pre-existing file of the same name in the CLS mod folder in your overrides, found in this directory: C:\Program Files (x86)\Steam\steamapps\common\PAYDAY 2/assets/mod_overrides/Coloured Loading Screens/guis/dlcs/pic/textures/loading

This should cover everything, but if you have any questions please get in contact!