I am 100% positive that DME and EGS had to be updated together on e53 with n62 engines. The computer system that dealer used at that time didn't allowed for the separate EGS update. I can't say with the same certainty that WinKFP works the same way, but I was there when he set this job up and BMW service computer only allowed for the combine DME/EGS update. I have no experience updating n62 with WinKFP. I used it successfully on 540i with m62tu engine.

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2012 X5 x35i My new toy
2005 X5 4.4 Her's (Retrofitted Servotronic Steering Rack)
2003 X5 3.0 Mine (Retrofitted Servotronic Steering Rack and Heated Steering Wheel)
2001 M5 Son's car
2000 540i 6sp Sports pkg, supercharged. Son's car (Sold)
2001 530i (Sold)
1999 528i (Sold)
1975 2002 (Sold)