doors

got it now. Yes guess that should work

Hey wait a minute, where did this name and position came from ?
Is it from tree.klz ? cant it removed from there ?

what name you are talking about? If you mean "Bounding Box696", this is just given by the plugin. In tree.klz they are written simply one after another. Finding the right one is imo nearly impossible, even then if you remove it how many bytecounts you have to update? And what else to get the file back working correctly?

There's a lot of info how tree.klz is build up and how collisions are load in-game here .

Then its read from 4ds file not from klz...

One question about checkpoints:
What if AI spawns to where is no checkpoints ? Does then AI will be stuck or how far it will function ?

Then AI will simply not move.

But there are a lot of checkpoint values unknown: Check2.bin on wiki .
Unknown 19 might be have something to do with it but i'm not sure.

I've tested with a custom grid and edited some of the values long time ago without any result. Could not figure out what the unknowns could possible be for.

I guess there might be some minimal distance for AI to use nearest checkpoint...

Try to run over some AI with a vehicle on a map where is no checkpoints...You will see AI try to get to safe by taking a step to the side or back.