I'm late to the party here but have been running tunes on my turbo'd BMWs for years. Racechip is simply not a player in the N63 arena. The tune sounds like some kind of off the shelf one-fits-all module modified to fit the dual TMAPs on the N63. Nobody in the N54/N55 or N63 community runs this crap.
If you are throwing codes, you are risking losing your warranty should you have some kind of failure. There is no way a Stage 1 TMAP plug in should throw codes.
I would run as far away as you can and consider instead a well researched and tested flash tune like Velos or BurgerTuning's piggy
There is lots of good knowledge at
www.n54tech.com