E39 M5 probably was equipped with nav and DSP... you say you don't have nav but got the DSP? what year/month your X and what year/month on that amp? we have to make sure pinouts on the amps are the same, before venturing into programming... sometimes they change pinout, add or remove signals on the pins...

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E53 X5 4.6iS
147K mi - Sold May 2013
Tireprints left in:
USA, Nicaragua, Costa Rica, Panama, Russia

E53 X5 4.8iS built 2005-10-17
66200 mi - June 2012
96000 mi - June 2013
112000 mi - June 2014
OEM fire extinguisher
OE first aid kit
OE tow hitch
OE TV module
OE aspheric mirror
K&N air filter
black/white badges
rear camera
4-channel video recorder

Here is the list of things I have done to the X