A loco config file should have an "interior" kuid mentioned (clone the asset ... open for edit in explorer) ... you have to edit the interior kuid, in 2 places, top, and at the bottom of the page ... always experiment on a clone
tried putting it in a couple of different TR08 trains to no avail
yep changed both kuid numbers in the config file & all it seems to do is change the colour of the floor
asset im trying to install is <kuid2:541259:100295:1>
That is a railcar interior, I thought you were talking about a loco ... but the way it is done is similar ... did the original railcar have an interior ?