Zoo Visitor has an elegant setting that makes {screen_name} very nice:
Set screen_name as a combination of the following fields
The default setting is {member_firstname} {member_lastname}. Perfect.
However, in Exp-resso Store, the 'billing_name' field is one field, so i'd like to automatically combine both fields to another field {member_name} which i can map to the {billing_name} field.
How can I combine to custom fields into one other field without the user ever noticing?
I'm not too fond on using a hidden field and some javascript in my registration process.