OK, 2 things. I was doing the slaver quest and cleared out the pirate ship but I had to cast raise dead on Keldorn so I did. But now Keldorn cant move and i cant leae without him and i cant rest in there. Also, how do I find that sword that the old guy in the sewer talked about?

try leaving and raising him at a temple, that should work.

as for the sword the old man talks about you need:
1 hand from drainage ditch in first room off the sewer hall
2 lover's ring from skeletons hanging by next intersection
3 staff of kobold shaman in drainage area
4 blood of friendly carrion crawler (kill it)

bring these items to room with pipes. i'm not sure of the order they go into the pipes but quick save and take notes. also remember that once you get something wrong, you have to start again (not the whole game, just the immediate puzzle)