Can anybody tell me which key to use on the skull locks in the maze of lifts section of the Serpent temple crypt. There is a locked grill with goodies behind it and also a intersection with a lever and a lock. I have tried the Monkey, Serpent and Heretic keys to no effect. I only have level 1 lockpicks and they won't get the job done so until I can open these locks I guess I'm stuck.

You need the Skull Key. You get this off one of those zombie looking priests who is somewhere in the lift maze area. I had a lot of trouble finding him also. I finally mapped the lift maze area by drawing 4 diamonds and then marking where each lift took me to what other lift (ignoring the passageways in between). Example:

A
/\ /\
/ \ / \
/ \ / \
\ / \ /A
\ / \ /
\/ \/
B

/\ /\
/ \ / \
C/ \ / \B
\ / \ /
\ / \ /
\/ \/
C

Hope this helps!