From the author's README on Thunderstore

Adds So What Are We Doing? by 20 Minutes Til Sunrise as a playlist

Playlists & Tracklist

So What Are We Doing?

20 Minutes Til Sunrise - So What Are We Doing
20 Minutes Til Sunrise - Cryptic
20 Minutes Til Sunrise - Carpet Burn!
20 Minutes Til Sunrise, Kaizo The Shogun - Waste Away
20 Minutes Til Sunrise - Oblivious
20 Minutes Til Sunrise - RedLight
20 Minutes Til Sunrise - Down Low (Exit Music)

Installation

Install via Thunderstore Mod Manager, or drop into your ReSkate launcher.

Packaged with ReSkate Music Packer

Install So What Are We Doing EP by 20 Minutes Til Sunrise

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for So What Are We Doing EP by 20 Minutes Til Sunrise and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.