2-1, second crypt: the other hooded zombie goes up the ladder. There are 3 zombie rooms (the 1st with a dynamite zombie; the 2nd and 3rd with a Shrieker each). The tooth carrier is in the 3rd.
Use
The other skull piece: with both, the sealed door opens.
Kill the Shriekers fast with the shotgun. In the 3rd room, shoot the bloated orange-chested zombie: it deflates and knocks the others down. The two routes can be done in either order.
