Access Custom Profile Fields during registration (register.php)

[0ptima]

I want to check the info that a user enters in the custom profile when registering.

In register.php, around line 367 there is the following code to set the custom profile fields:

PHP Code:

    // set profile fields
    $customfields = $userdata->set_userfields($vbulletin->GPC['userfield'], true, 'register'); 

How could I access that data?
My custom profile fields are called field1, field2, field3, field4 and field5

thanks.