Sorry for frequently harassing you Manu but I've discovered yet another issue.
Anyways the court02 file folder was fine and my replaced 'court.jpg' file was fine before this issue occured -- then after I quitted and played again sometime later I experienced some issues. In game play I noticed the court reverted back to the original TE grass-court one. So then I opened up to check out what was wrong with Court02 -- mechanically and visibly there seemed to be no problem in my opinion, and every file inside it should actually reflect that it would work as it should with the replaced court picture -- and yet gameplay behaves otherwise; showing the original TE grass courts instead.
HOWEVER, I did notice a little difference in how court02 would react in me replacing "court.jpg" files. So what I did was replace it with some other (ie. just randomly) picture of a court and then i renamed it as "court" (as per normal) -- but weirdly, after changing the name, it did not move into alphabetical order automatically -- and when it once worked, it would automatically place it alphabetically. And that's evident because all of the other courts 01,03 to 09 behaves in a way indicating that a replaced court works. Funnily enough, only court02 doesn't seem to comply with the norm, and I think that is the cause of the issue.
I've already intervened by using QPED and exporting that court02 file folder to /Data folder again -- but alas the issue couldn't be resolved. So yeah it's weird; one minute it was functioning normally, the next moment it wasn't. Have you encountered something like this before Manu? What are your thoughts on this?