Data capture issue about billing information

[JaviG]

Hi, we set up a virtuemart cart in a website, through a SIM method with authorize.net. my client doesn´t want to capture any sensible data from the shop users, not even the name (just zip code to calculate shipping), because authorize.net offers their own form to fill. In other words  we don´t want the users to fill the "Bill to" section just the "Ship to".

Is there a way to hide the Bill to section in virtuemart and not pass this information to authorize.net?

Regards
Javier G.