Registraton form layout

Hi,
I have created a number of custom fields to be completed during the registration process. I would like to seperate these custom fields from the standard fields and place a heading above them. Is this possible? Maybe the addition of a "seperator" type in the custom field setup would be appropriate for future Hikashop versions (just a suggestion). Also, are conditional fields possible? eg: if you answer "yes" to question A then you must also complete question B.

cheers!