It's a 5 minute install/removal.
1. Unscrew 4 screws off the top of the cowel
2. Lift the cowel up
3. Unplug the ECU
4. Plug in the JBD into the ECU
5. Plug the ECU cable into the other plug on the JBD
6. Put it somewhere safe and sturdy
7. Put 4 screws back in on cowel
It's that simple.
Also, it's not DMS, it's BMS (
http://www.burgertuning.com).
More specifically, this is the thread you're interested in:
http://www.n54tech.com/forums/showthread.php?t=5571