I haven't seen that mod yet. I have seen a total replacement of the Idrive that accesses the NAV screen. You might try posting your question on an E60 website<---click here.
2004 E60 530is, Delivered 12/12/03, TiSilver/LGrey, PP, SP,PS, PDC, ACC, FRS, Step, Xenons, clear bra, body colored rear inserts. (Retired, 1983 henna red 320is)
2004 Corvette Z06 Commemorative Edition