From the author's README on Thunderstore

Bloodhound Q50 Music Pack

The installable ReSkate mod is in Bloodhound_Q50. Copy that folder into your ReSkate Mods folder and enable it in the launcher.

The original MP3 files are kept in source_audio. Keep this folder alongside the mod if you want to reopen and rebuild the pack.

This build includes the 12 audio files supplied for this pack.

Install Bloodhound Q50

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

Open ReSkateLauncher.exe and go to MODS.
Search for Bloodhound Q50 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.