Now i would never have even consider doing this as i know how you can destroy a car with a incorrect map, but this has had good feedback and all you are doing is loading a map created by the company selling the logger, you are not changing the map yourself.
http://www.fastchip.nl/content/view/25/37/
Obviously this is just for renault the RS series.
What are people's thoughts about these, deff means a cheap re-map at 159 euros. dunno..