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The ammo boxes in use have special properties that force them to all automatically appear and respawn once picked up by a player after a selected amount of time.  You can adjust the respawn time in it's properties.  The default value is 45 seconds.  This ensures that ammo is available in every arena because it removes the randomization of spawning.   Currently there are no Item pickups in use.  You can add these in, but keep in mind there is no code support to guarantee fixed spawns for them like there is for ammo boxes.

Miscellaneous

The player customization screen uses “KFCustomizationPoints”.  You can find these off to the side of the start arena.  

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