I spliced in some 20w bulb carriers & bulbs and it fixed the low beam error message permanently. It provides enough resistance to fool the computer that halogen bulbs are still installed and is easy to remove when I sell and want to revert back to halogens.

On the E39 (i did exactly the same thing) I used 10w bulbs but they did not work on the e53 so I had to raise the wattage of the bulb's.

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Current:

E92 M3 - Alpine White / Fox Red

Retired:
2007 650i Barbera Red
2007 750i Jet Black
2006 M5 Carbon Black
2002 X5 4.4i Steel Gray / Black
2002 M3 SMG Carbon Black
1997 BMW 540i Aspen Silver
2000 BMW 528i Jet Black
1997 Range Rover HSE
1994 Porsche 968