Umberto thanks. I just scanned my computer with FSX Airport scanner, and I don't see any duplicate (I use only Fsdt scenery anyway).
I un-installed Fsdt's KLAX V2, restarted FSX with KLAX stock airport, and my planes on ILS approaches still do not perfectly align in the middle of the runway....so it must be something else...Please let me know on my picture what seems to be duplicates.
G.Bosak, I haven't tried your solution because I never moved my FSX folders or changed computers, and all the paths work well otherwise. You think I should still try the registry repair without any possible damages elsewhere? Thanks for your response though.
Bruce, you might be right then...thanks for your wise insight
Johan