Jacob's Rest Practice
This tiny addon allows you to play Jacob's Rest Practice map in multiplayer. It is Landing Bay and Cargo Elevator maps united in one map.
Download ~2kb:
http://gamebanana.com/maps/191562
http://www.moddb.com/games/alien-swarm/addons/jacobs-practice
Installation Instructions:
Discussion, feedback, bugs:
http://forums.steampowered.com/forums/showthread.php?t=2893539