It can definately be done. I just learned that to keep the functionalities and be able to turn the screen on I must keep the Nav system. That's ok though...there is space. I'm going now to mock up a custom frame out of cardboard...easier than tracing the cable as it's still raining a lot.

BMW X5 4.8iS 2005

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BMW X5 E53, 4.8iS - 2005
Professional Stereo/Nav with DSP (modified BM54 module) - Converted to Eonon GA5166X with Reverse cam
4-Corner Air Suspension - Converted to BC Coilovers