Seeing as I just sent this to Elmo, I thought I might post it here too. (It's written by me)
This works for Windows. I do not if it will with any other OS.
With testing maps: I will use this as an example:
http://www.1upclan.info/forum/index.php?topic=4104.01. Download the file (which is the map of course) from the topic. It is under the post, in-between the person's signature and the post. In this case, it is called ut4_FortFight_v1.pk3.
2. When a box appears, click 'Save'.
3. Save the file into
Program Files/Urban Terror/q3ut4. q3ut4 is the folder you must save it into. (Check if this is the correct folder. There should be all the
custom maps you have downloaded from servers in that folder - ut4_orbital, ut4_1upfun1 etc.)
4. Open up your game, Urban Terror.
5. Open the console by pressing the '~' button.
6. Type:
/map ut4_FortFight_v1. This should load the map up ready for testing. If it doesn't, do it this way:
Open up your game, Urban Terror.
Type in the console:
/sv_pure 0Retype in the console:
/map ut4_FortFight_v1. That will surely work.