Let us stop to think about why they dont offer a new email address outside of the account login, then maybe you will understand why we , or anyone else for that matter, can not help.
So, lets say facebook asks you for a different email address to send the password reset. You put in your new email and everyrhing is good. But, lets say I get your username and ask facebook to send me YOUR accounts password reset to MY email. Facebook would not know that it is my email based on what you are expecting, and I just hijacked your account. That is why they don't offer it!!! Re-read the above posts before posting back, please.