I did a previous edit of this map with Warlords...
...and ut2k4 Cannons.

This is the classic CTF-SpaceNoxx setup for 4 team Capture the Flag.

I chose the helicopters of XV as of the all Xvehicles they're the least armored of the lot and, relatively, easy for players to shoot down. Which makes for much easier gameplay and less need to put special weapons on the map to even the odds a bit.

Usual Suspects:
.umx - /music
.unr - /maps
.utx - /textures

If you don't have any of the CTF4 gametypes...
...you can get them there.