I'm on the part where you fight dessan for the first time and you don't have force powers or lightsaber. How do I kill him?

Quite simply, you dont! It is designed so that you lose, that's how the story goes. The only time you beat Dessan is at the end of the game in the temple (thats all i'll say). But just run to him with blasters firing. He will chop you up and you can move on.

lol did you have god mode on? cuz i wonder how you couldnt beat him since you die pretty fast and find out that your supposed to loose on purose anyways XD

you hit him with your lightsaber

you don't have one

Even though he's got godmode through scripting, i killed him by setviewposing ontop of him. It still does the losing cutscene though.

i just used the cheats but my brother got past this simple without any cheats.