Wireless Access

What is required and how do you add an SSL cert to an instant AP captive portal.  Will a wildcart cert work?

I have a customer that would like to not have the security error when guest users are directed to a captive portal.  I'm assuming there needs to be a DNS name defined, but where?  

Thanks,

The instant User guide here:  http://support.arubanetworks.com/DOCUMENTATION/tabid/77/DMXModule/512/EntryId/10289/Default.aspx gives details on how to upload