Ok, there are good and bad news.
Good news - as you can see, I seemed to have made some progress with my barn. I used some of
jmyers stuff in and around my barn (cannot really see it inside, I think I would have to re-position it), and I changed the position of the pickup because otherwise it would overhang the lot a little.

Bad news - nightlighting is not working ingame:

although I do have a light applied in gmax, as you can see from my earlier images.
Which isn't that bad at all.
What really hurts is that I now receive an error message when I try to open my barn in gmax. And from what I remember, that means my barn is dead now with now chance to recover it ... that's why one should always make a backup of his gmax file after some time. Unfortunately I remembered that only after my file got corrupted

But anyway - here it comes in handy that I still have the first version with the "clean" textures, so .. well, let's see it as some extra training course in modelling ...

Apart from that - what do you think about my barn in general, and any advice regarding the nightlighting at hand?