I have it like this and the grey box goes up without me.

http://imgur.com/FrsdG71

Is it because i have a support made floor that covers the grass?

You can change the color by changing it in the material editor, a constant color texture slot is used for this purpose.

Do i have to go into blender to change the color?

You've just to place the ladder as in the example park. Maybe I should mention that this script does not work when the game is paused due to the nature of the scripting engine.

To investigate what might going wrong disable the "Alpha Test" for the "invis" material provided with the ladder in the NL2MAT editor, "Alpha and Blend" tab, then reload the ladder object. You can see the transport element in play mode then. It should be aligned with the ground at the initial state and then move up.

I have it in the position but the walkmode does not go up the ladder at all. I tried the back and still nothing. Do i have to add a trigger to the base of the ladder?

Done, enjoy!

Id defiantly say update this package soon with a ladder that can be scaled.

You have to modify the model in a 3D editor. I strongly recommend to use Blender for this purpose since it's free software and I've included the .blend file to modify it quickly.

Maybe I will update this package soon and include a ladder that can be scaled in the editor but I cannot promise anything.

How do you customize this ladder? I need it to go up the side of a building to a higher entry to enter a indoor coaster station.