WOW! Nobody answered your question? Sorry...

You do not need to use scripts to make doors open or even to insert sounds and messages when secrets are found.

To get a lever or button to open a door, you need to link the button to the door and tell it what to do. It's simple, but let me get back to you. I'll need to take a few notes so i am using the correct terminology and item names. I'll be back to explain how to get levers and buttons to work unless you find out sooner.

Like I said, you do not need to script to make a full blown adventure. It helps for the more complicated stuff and complex puzzles, but it is not needed. Maybe to end a game it is though. Still playing around with the editor myself.

I'll probably just confuse you more on the programming side. I'm just learning scripting myself. Here are some links that I hope will help you a little bit. If not, there are other links from their site to others...

http://www.grimrock.net/modding/scripting-reference/

http://www.lua.org/pil/contents.html