[Q] Car GPS tracking, with SMS

Hi,

I'm looking for a app for Android, that can send me the coordinates by SMS to me. Lets say I send a text to the phone, my GPS-tracking Android phone, hidden in car must respond back with another SMS. Preferably with a link to Google Maps. I've found a couple of Apps that can send the position to their web page, but through GPRS/3G connection.

Is there any app that can auto respond with the coordinates back by SMS? I'm having a Android 2.2 rooted phone for this.