Not sure how to change the form fields position in Membership Registration Form

https://www.dropbox.com/s/op2i7us84b1k1hk/Screenshot%202014-03-14%2001.25.03.png

Where to change Account Details Form layout?
All other fields were added by using BuddyPress, how to add more features for example DOB, I don't want the year is more than 2004 for example. Also, I want to add File Upload field to this form.