Same as in topic. I have no idea how to do this.

First go into root/raw/maps and find the file called "nazi_zombie_sumpf_zipline". Copy it to the directory "mods/*YOURMOD*/maps. Open launcher and check the file in the IWD list for your map. Open your mapname.gsc and find the line

maps\_zombiemode::main();

. After that line place the line:

thread maps\nazi_zombie_sumpf_zipline::initZipline();

So it should look like this:

maps\_zombiemode::main();
thread maps\nazi_zombie_sumpf_zipline::initZipline();

Save the file.

Next go into radiant and make a new misc>prefab and in the _prefabs directory load the file called "nazi_zombie_sumpf_zlift.map". Place it how and where you want, then save the map file, build and compile your map and then you have a working zipline.

Worked! Thanks Saje!