Download the pack from the resources tab

Unzip the download, and navigate to the folder "MKF v2.0 Riivolution/mkf/Course/"

This folder contains all of the tracks (the .szs files) in order. You can find out which track is which based on their order in this PDF: https://docdro.id/XlPvzoa

Plug in your SD card with CTGP into your computer. Grab the course file you want to play and put it in your "My Stuff" folder