Good news guys!
I made some test yesterday, in the fact I spend my day over tests. About flickering pitlane, I "acoxambrated" (Brazilian expression that means "made in the tighs", some solution not very well made :D) the pitlanes, and they stopped flickering. All my pitlane objects are now bridges. I think that we can use bridges as track decals, cannot we?
But the great thing I think I did, is that I took control over the terrible ESC CTD. I tested in both WIP tracks I'm working on, and worked. The last sector must be longer then the rest of the sectors. This will cause a "Erreur" in 3DEditor when adding track from .dat. Then you must delete the last trackxx object (as you can see, you'll get the same error when select it with graphics on and camera unfixed, and nothing will be highlighted).
As usual, delete the last sector to create the bin and voilá, the things are ready.
I can proudly announces that I'm not seeing any bug in my tracks now.
Thanks for all, Laurent! Mercy beaucoup!