Seeking Assistance With Scripting

Hi, I'm trying to create a game in SL and unfortunately I have no background in scripting, or anything that remotely resembles programming. I need assistance with a couple of my ideas for this game, so hopefully I can get some help.
My game concept is a Legends Of The Hidden Temple game but taking place in a tower. I just need some help with scripts I need in order to get the game going.
For the first floor I'm making a puzzle where a team of two has to solve a puzzle where they place objects on sensors in, and once they places the items on the two correct sensors, the door they need to exit from opens.
so, i need to find out 1. how to script the sensors, and 2. how to script the door to lock and unlock once the puzzle is solved.
Unfortunately, towers have a second floor too, but its a relatively similar puzzle concept. There will be a lot of puzzle pieces around and they just need to place the right piece on the pedestal and that will unlock the door to progress to the next floor.
Thanks!

p.s. I have linden dollars to compensate for help!

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