Had a quick look, played around a bit and got the teleporter working one way; then I remembered I recreated a Portal Gun in one of my other games and figured it's pretty much the same principle, so here's the event sheet for that:
<img src="http://i.imgur.com/mNMSn.png" border="0" />
I made it before I got my head around variables, so it's not elegant, but it works.
IIRC the last two events should be enough.