If you want to run some ILs in this game in another mario kart hack (this is recommended if you have a small SD card and don't want to only have 1 CT installed at a time), follow this guide made by Mango Man: https://www.speedrun.com/mkfusion/guide/s30rt

Please note: this isn't recommended for SPD tracks since they have a bonus speed modifier when playing in MKFusion. Also, just because another hack has a version of a track doesn't mean you're allowed to use that. Mario Kart Fusion often times will user either older/newer versions of tracks in comparison to CTGP which allow for different cuts, so replacing that track with the one from Riivolution is a requirement.