Hi
I do not have a tutorial but a prefab, for anyone to use.
You can download it and use it to make your own CTF map.
It is called “Loffy’s CTF Prefab” and you can find it here:
http://www.acc.umu.se/~loffy/mapping/maps/loffysctfprefab/loffysctfprefab.htm
It is a zip file (loffys_ctf_prefab2.zip). Download it and unzip it. You will find the loffys_ctf_prefab2.pk3 and the Read_Me inside.
The pk3 (loffys_ctf_prefab2.pk3) is a fully functional CTF map for ET. Just put it in your etmain-folder and play.
Skybox by Sock. Additional voices by TaZzMAjazZ. Allied and Axis flags as .md3 models for Enemy Territory created by Topsun.
However (and this is the whole idea): If you rename the loffys_ctf_prefab2.pk3 to loffys_ctf_prefab2.zip and unzip it, you will find the folder “maps”.
And inside that folder lies the .map file. Open it in your editor, save it under a new name and throw out stuff, add stuff, make ramps, toss out boxes, et cetera, and create your own CTF map.
Good luck!
//Loffy
PS. A nice “old style” CTF map for ET is the dark and eery map “GreyHour”, by Lang. It is a remake of a map called “q3ctf3” from Q3 Arena.
You can download it here, I think (haven’t tried the link): http://langstas.com/maps/lp2_ctf.pk3