I found this website that is a forum for Hualingan products. These guys may have a little bit more info. Its a new forum so theres not a lot of info yet. But they have a working knowledge of how thing can be installed.

Car Solutions Dude ¦ In-Car Entertainement, care products, accessories and gadgets at a fair price

I am waiting to get mine, I hope it shows up this week.

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2010 X5M /// R63 AMG...Wifey's 540HP Family Hualer

2001 X5 3.0i Sport 335,448 miles & counting...
SMG M3 Steering wheel
E46 Stainless Racing Headers
4.6is Exhaust
Turner Pulleys
Afe Intake
Brembo drilled rotors
PowerFlex Bushings
Hualingan
30mm H&R Spacers rear
20mm H&R Spacers front
Bavarian Autosport High-Performance Coils
Active Autowerke's Performance Software