It's the Unoficial Zero Gear Map Editor tool made by Eikester. With this tool you can make race track easy. Install: Extract the zip where you want on your computer.
.pathnode used for the ai to follow your track
.checkpoint used for checking the laps and add turbo
.cp_marker used with the checkpoint for display if the next checkpoint is on...
-Use the left panel to put objects/dummies in your track..
-Create an object click left two times on it.
-Click on the Mov buttons and use the mouse wheel to change the position of the object.
-Click on the Rot buttons and use the mouse wheel to change the rotation of the object.
Tip: you can edit precisely the position and rotation of each object/dummies under the right panel box.
-Use the right panel for select your track object/dummies of your track (you can select directly in the 3d view with the Arrow Button).
-When your track is closed you have to put pathnodes all around your track use the same way as you put the track object.
-Now you have to put checkpoint (at least one).
The first checkpoint in front of the green arrow (spawnpoints).
click on> (+) Size to edit the x y z values to change the size of the checkpoint area.
Adjust the size of the checkpoint to match the size of the track object.
Now next to the first checkpoint create only two cp_marker dummies.
Each checkpoints have two cp_marker dummies example:
checkpoint1> cp_marker1 and cp_marker2
checkpoint2> cp_marker3 and cp_marker4
Your track is almost finished now just put some weapon box inside your track.
Now save your track and click on> Export map to Zero Gear and launch your track.