Installation
drag and drop the trains1.dat trains4.dat
BEFORE YOU REPLACE THE trains.xml file If you have kitsune select kitsune if you have kitsune and overhauled select kitsune and overhauled if you have overhauled extra overhauled and kitsune select kitsune overhauled overhauled extra
mods/update/update.rpf/common/data/levels/gta5
For LSLocal.xml drag and drop it to GTAV/scripts/autoloadmaps

Watch this vid from Shrek702 to understand
https://www.youtube.com/watch?v=ITRpvsEKpCc