wordpress customization

Hey! this is a bigger project but i brake it down to small tasks! In Sweden web have someing could organization number sweden it for companies and personal number for private person both person number and organization number .it's personal/company identity number consists of 10 digits and a hyphen. in the personal numbar it's person's birthday, in YYMMDD. They are followed by a hyphen, and four final digits. The first task is an easy one! i have my website [login to view URL] i need to make some changes to the theme! when you register as new user! you register as private person or company! Registration • Student/privateperson (sign up/in with facebook/google) option o First name & last name o Person nummer o Post nummber o Email address o Password o A next button  upload your student document Then you get an email to activate your account and fil the rest of your profile (see student profile section) • Company o Company name o Contact name o Organisationsnummer o Post nummber o Email address o Password • Then you get an email to activate your account and fil the rest of your profile (see company profile section)