Make sure to first have SuperBLT, and CustomOST installed. Click the links in the dependency list.
Optional video tutorial for installing SuperBLT, BeardLib, and mod_overrides mods: https://youtu.be/rin_sjSJIkg
mods\CustomOSTTracks
Step 1: Download the mod Step 2: Extract the mods and put it in CustomOSTTracks Step 3: Done