I picked up my first Dmax a little over a month ago. A buddy of mine has the V2 and I just got it from him but he pretty much is letting me have control of it for awhile. My question is, Can I update this V2 w/o ruining the previous tunes(or stored info) that my buddy has done to his truck? I'm the techie on of the friends so I'm trying to make it current. I know I have barely scraped the tip of the iceberg. Thanks