I'll do the easy part for you to save time...
datablock fxLightData(PlayerLight)
{
uiName = "Player's Light";
LightOn = true;
radius = 10;
brightness = 9;
color = "# # # #";
flareOn = true;
flarebitmap = "base/lighting/corona";
NearSize = 2;
FarSize = 1;
};
Just enter the color you want and package it as an Add-On.
You do know how to package, right?