Alright pal! I a way! It lacks awfully much, and could actually be made using only movement, because Parallel process and auto start is very bad on events other than Common Events. Now...
You'll need 4 switches and 13 events (I used 13, a better game might need more or less).
First, make the switches. Call them Up, Down, Left, and Right, in whatever order you want. Now make the character you need to be able to sneak past. Mine didn't work correctly, so I hope you can fix problems yourself. I'm not excactly an ace with rm2k3...
Around him/her make 3 events (I used three) that have no sprites, and that must be activated by stepping on. To the left of the character, make the trigger switches of the events "Left". Do the same with the other events, with the right switches for the right direction. In each of them, place what will happen if you are caught (eg. Guard: Stop!!, and then Gameover)
Now to the long part. Determine the movement of the character, using only "Face Up" etc. kind of commands. When you've planned it out, plan how much time he will spend looking in one direction, until he shifts into another. In between these, switches will turn on and off. Here's a quick look on how you can do it, with using parralel procces and with events of "move" commands in different places: This is organized, and the move all is needed (I think).
Attached
Now, I don't know what label does, but it seems to me to repeat. This is just a guess. Plz change it yourself, I won't be on my pc for 2 days, and I have to go to bed, so I'm in need of more time. Hope ya like it. Could be done easier, only using moving...