Copy app to /Applications/KDXServer1600, try and run it. Define shares and link folders if necessary:
ln -s /my/shared/folder /Applications/KDXServer1600/Bases/Default/Downloads.
Create a LaunchDaemon (from haxial.com):
sudo nano /Library/LaunchDaemons/com.haxial.kdxserver.plist
Load the daemon: $ launchctl load -w /Library/LaunchDaemons/com.haxial.kdxserver.plist $ launchctl start com.haxial.kdxserver
http://developer.apple.com/macosx/launchd.html man 5 launchd.plist