How are you going to be using this? Are you going to have the walls transparent? It's probably best to post jpgs as the attachments - that seems to be the standard.
It's a great adventure to take a fist shot at PS with. At the moment I'd say that the textures are overwhelming the structure of the map a little. I'm finding it hard to read the different elevations. Also, I can't remember what's in the middle of the room. It looms like ice from the texture that you've got there. Is that what it's supposed to be?
Welcome to the guild - chip in with specific PS questions and we'll help out in any way we can.