Retextured animated trap door that was mentioned here:
http://www.quadropolis.us/node/1068
(made using Blender and Photoshop)

Added much more detail in the hinges as well as with the UV map itself

Note: Doors look better in game with the bump mapping than the blender screen grab

Install instructions:

Unzip contents to the Sauer folder - it should get placed correctly on this path:
packages/models/steve_e/doors/...

for the map .cfg (or however you intend to place it):

mapmodelreset
mmodel "steve_e/doors/trapdoor" //4x4 sized door
mmodel "steve_e/doors/trapdoor/trapdoor_150" //6x6 sized door
mmodel "steve_e/doors/trapdoor/trapdoor_200" //8x8 sized door

Make certain you are in SP mode, place the door and set it to type 10 (auto open) and check them out.