You guys DID notice the user map, right? Just use the correct fields in your respective profiles.
I think he's saying he wants to fire them at the same time, which you can't do with Ping sensors since they'll pick up the other sensor's signal it sent out.
You can get it working, but it will take some fine tuning.
Thanks for the interest, they are these
Where are you located? I am from Canada so its not worth it for the both of us if your're live over sea due to shipping cost.