I found a post about using Gravity Forms to set a cookie and then using that data to pre-populate other form fields. However, we actually create a PHP session variable to store several data fields when people login, using a custom user authentication system. I would like to pre-populate certain Gravity Form fields with session variables from that session. In a standard html form this is pretty simple and straightforward, but the Gravity Forms plugin doesn't seem to allow insertion of the standard php code. Any tips on how we could easily accomplish this? Thanks.