Welcome to the JK series forum. You have a valid question, but one that belongs in another forum. The Knights of the Old Republic Strategy forum is here.
Post your question there, or wait for a moderator to move this thread. There you can ask questions about Kotor or Kotor II.
I will be happy to help there, I am a Kotor fan.
And, by the way, how to kill him depends on who is in your party at the time. If you have Bastila, and you collected the Double-Bladed saber off of Brejik's corpse, you give it to her and let her do fighting. Start by lobbing a grenade, and set you and Bastila to melee, and the third guy to blast. You'll find it easy enough.