Resetting my entire profile

Hi

Is there a way to reset your entire profile back to the beginning?

If I change my username will that do it and will my friends be informed that I have changed it or do I need to tell them?

Thanks

Nigel

Hi

I can reset the progress in single player and multi player but this does not set the EP targets back.

Is there a way to reset EVERYTHING so that I can start again from scratch?

Thanks