Agreed, the forum with it's time-out is terribly irritating.
I always use the latest beta, I think you can get beta-versions through steam too.
Here's an image of the event sheet.
I created three sprites with two frames (red and green)
I created a green tiledbackground and set it to invisible.
<img src="https://dl.dropboxusercontent.com/u/48563442/Open-Safe.png" border="0" />
I think these events are pretty easy.