Well, in the second part, when you, as a Dark Side character, have to fight to the death against the surviving Jedi Masters, it's quite difficult if you're not playing on an easy difficulty level... By the way, there's a similar moment on Dantooine... although then they offered to buy a fake holocron... It's more profitable, but not easier...
And about the holocron, I didn't understand, is this from KOTOR 1?
Where do we end up when we save the world?