Baron Norge & Gostrim Ghost quests, is there a way to do both?

[Metroplex]

I tried searching if this topic was already posted, but couldn't find it.
My problem is that I first take the Ghost quest and then go to the castle, the baron then offers to give me money to kill the ghost and I accept, I go back to the ghost, tell him the baron wants him dead, he then offers me an extra 1000 gold coins to kill the baron, after I go back to the castle I have no choice but to kill the baron but this makes the 'kill the ghost quest' fail.:evil:
So has anyone done both? Is that even possible?
Or it is so that you can only do one quest?

[Metroplex]

I guess no one here has managed to do both then.

[Elwin]

Well just no one looks on this forum anymore since AP is realised. Thats sad.And i do not remember solution

[alboy]

l have never found a way of doing both quests.