This is fairly simple and straightforward...

...HallOfGiants for CTF4, lots of flying space which seemed ideal for the helis of Xvehicles.

At the top are team specific helis close to where the flags are.

While further below...

...are not at all team setup helis for anyone to use.

If you don't have any of the CTF4 gametypes...
https://unreal-games.livejournal.com/169182.html
...you can get them there.

Usual Suspects:
.u - /system
.unr - /maps
.png - Pwetty!

Enjoy!
https://www.mediafire.com/file/js1s1y50deez8ck/CTFM-XV-HallOfGiants.zip

You can get Xvehicles here · https://ut99.org/viewtopic.php?f=34&t=14936 · which you need to make this work!