Hey,
open up inludes/contact-form.php. You can adjust the elements array (i.e. delete elements, change labels, rename elements, add elements, etc.) and customize the contact form. Supported elements are text, textarea and decoy fields.
$elements = array(
'yourname' => array('type'=>'text', 'label'=>__('Name','avia_framework'), 'check'=>'is_empty'), //user name
'email' => array('type'=>'text', 'label'=>__('E-Mail','avia_framework'), 'check'=>'is_email'), //user email
'website' => array('type'=>'text', 'label'=>__('Website','avia_framework'), 'check'=>''), //user website
'subject' => array('type'=>'text', 'label'=>__('Subject','avia_framework'), 'check'=>'is_empty'), //subject
'message' => array('type'=>'textarea','label'=>__('Message','avia_framework'), 'check'=>'is_empty'), //message
'myemail' => array('type'=>'hidden', 'label'=>'', 'check'=>'', 'value'=> avia_get_option('avia, email') ), //email adress the form should be sent to
'myblogname'=> array('type'=>'hidden', 'label'=>'', 'check'=>'', 'value'=> get_option('blogname') ), //name of the website, gets added to the subject line
'username' => array('type'=>'decoy', 'label'=>'', 'check'=>'must_empty'), //decoy input field for bots, input field gets hidden, if bot enters value form wont be submitted
);
A nice drag'n'drop alternative to the standard contact form is: Formidable Free or Formidable Pro - the plugin offers advanced form fields, etc.