compile the game with alle the scripts
Try to set up a loader-function in the beginning of your main,
and (as mentioned) excange the defines
in alle your scripts with something like this:
#define HEALTH 100
#define SPEED 55
..
my.skill1=HEALTH;
my.skill2=SPEED;
----------------------
to a new approach:
var tuning[1000]; //containing the var for tuning
#define HEALTH 1
#define SPEED 2
...
my.skill1=tuning[HEALTH];
my.skill2=tuning[SPEED];
So you load it from an array filled in the loaderfunction.
The loaderfunction fills your array with the variables,
read from a file.
In the manual read about how to save/load variables from a textfile. It not very complicated.
You could even use EXCEL to define all this data, and export
it to a CSV file.