I mean by that i want to convert the normal kyle to have the _boss ability to fight like this one but i cant find where the _boss script come? beacause its the only real difference .
Uh, not sure. Check the kyle_boss vs. kyle npc files. They're in one of the asset pk3s in your /gamedata/base directory.
(".pk3" files are just renamed zip files.)
They are both in the file: base\ext_data\npcs\kyle.npc
I don't know why you would want to mess with them... for one thing, the allied Kyle npc is a million times stronger, and uses more force powers, than the enemy "boss" Kyle.