anyone in NYC knows how to code a car to enable features

I had met someone here or on another bmw site, I can't remember about a year ago, the guy was from the bronx, and he had enable the opening and closing of mirrors and trunk from the alarm key. windows up and down. Anyone familiar with this or has dealt with the guy, my car was reprogrammed and I lost this features

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BMW X5 2003, 3.0