This map isn't an exact replica of the Battle Room- there are four rooms with flags at the top around a two-story central room with a gravity machine. To get to the enemy's flag, you start out going down, but then you have to go though the central room and then up.
I found out that you can simulate gravity with pushers, so there are places in this map where there is gravity, and to find out where just listen for a humming noise. The spawning rooms have gravity, but as soon as you drop through the one-way energy membrane, you're floating free. The machine in the central room also generates a weak gravitational field near the top, but it's more like on the moon than on earth.
The gravity and aircub vars are stored in the map, so you don't have to fiddle with anything to play. Just remember: although unlike in the book you can control where youu drift, you move slowly and it's hard to change directions, so parkour really is your friend here. Also, since the aircurb value is higher, you can get a lot of momentum going.
Here's a screenshot:
Have fun!
