As far I'm aware and I don't know much about engine remaps, but there is software that let's you read the ECU to modifi e the files and you would go to a garage to get your remap done but, isn't it just for one stage, wouldn't you be able to have a file saved on a had unit and copy and paste if you want to change remap to different stage? Like have one for economy, city drive, performans, race? Or am I wrong? Would be no need running just stage 1,2,3. Would be able run what ever you wanted to? No need for laptop? Or is it all just sainfiction?