How do I convert touch coordinates

I have been working hard on getting a mathmatic formula(if thats how you say it in english) for converting touch.X and touch.Y in to coordinates on a layer wich is parralax X and Y 0. However I failed at it.

So I ask the community. How do you do this?

My goal?

I want to touch the screen and underneath my touch, I want a object to spawn on a layer wich has 0 parralax.

So something like

Create object "1" on layer "X" at ................................ (thats where I just can't figuire out what to do. )

I hope some genious can help me:D

Here you go. Just use Touch.X("layername") and Touch.Y("layername")...

Check this example:

[attachment=0:f7g3g1ir][/attachment:f7g3g1ir]

Is it what you need?

You sir, are a genious. It's excactly what I needed. Thanks for your response:D