I have done most everything in the game except the one tomb I cannot open because I don't have the key for the quest....(not to mention the floors underneath the church but I think that is after)

Where/how do I get the key for the tomb in the cemetery in the northeast to the right of the cursed baby thing.

Right at the end of the main storyline and just before the end of the game. You will automatically get the key to reach someone in that tomb by someone.

Can you give me a hint? I've cleared out the wear wolves...the tombs....the cannibals...the ghosts...talked to everyone I can think of in act III...I do not know what to do...I've helped the lady near the hanging tree....I will try now and search the execution place and the graveyard...would hate to come this far and not finish the game...

The main storyline in act 3: Reach and find out the truth about Grandmaster Cristoffer de Malamert of the Brotherhood of the Righteous at the lowest level of the Citadel dungeons. Discover the actual conspirators of the Children of the New Order. Get the Tribunal to approve of your arrest of someone. Reach that person at the lowest level of the church. Return to the church and speak to the remaining member of the Tribunal. Obtain and pass over the bodies of the dead women in all three acts to someone. Enter the respective kingdom of Cerdie, Bafomet and Arthamon and defeat them from the lowest level of the Alvaron church, below the Glatzburg place of execution and at the lowest level of the orc caves. Return to the church to obtain your last quest from the remaining member of the Tribunal. You will get the key to reach the tomb from this member of the Tribunal.