That would be a good idea, except you cant do that, at least with the superchip programmer. When you plug it into your car is saves your stock settings. Then you tune it as you want and it saves that also. Now lets say you go tune another car, well your cars stock program that WAS saved on the programmer is now gone and your stuck with whatever tune you put in your car. The only way you could do it is by putting your car back to stock then tuning someone elses car, but then when you want to go tune your car youd have to put their car back to stock or else they will be stuck with that tune.
And for Too Slow, I recomend getting the diablo programmer. It has a lot more options then the superchip one for about the same price. You could either get the programmer and tune your car whenever you want for free, or get the chip and tune it for gears now and when your done with all your mods get a retune for $75-$100. I think what I might do is get a new chip after I finish moding my car, then sell the programmer if I can. I think this is the way to go with autos because tuning the tranny makes a huge difference. Remember a chip should be your very last mod.