How to copy data from one featureclass to another one using Python code?

Greetings,

I am new to Python but not new to ArcObject & .Net development. I just have a simple question that need some care from the Python developers if possible.

I have two featureclasses loaded in ArcMap and each one of them has different fields names and different count of fields.

What I need is to copy data from the 1st FC to the 2nd FC and allow the user to select fields from the 1st FC and map them with the corresponding fields in the 2nd FC and this is all using Python on ArcMap10.1.

Please support me in this case ASAP.

Thanks in advance...