Has anybody every downloaded this add-on and if you have do you know where to paste the files to (last paragraph)
https://sites.google.com/view/theuktrainspotterofficial/downloads The instructions are incomplete, so if you aren't familiar with the game's folder structure you'll always have bother. Paste the class166_dmocl.GeoPcDx file into the .JT_ChilernRailwaysRevised\DMOCL folder, the dmos.Geo into the DMOS folder, and the mos one into the MOS folder.
No you don't...it shows in the available stock listings just like any other item. Are you trying to use it in a Free Roam/Standard scenario or a Quick Drive?