In register.php, find the following:
message($lang_register['Reg e-mail'].' <a href="mailto:'.$pun_config['o_admin_email'].'">'.$pun_config['o_admin_email'].'</a>.', true);
Replace with the following:
message($lang_register['Reg e-mail'], true);
In lang/English/register.php, find the following:
'Reg e-mail' => 'Thank you for registering. Your password has been sent to the specified address. If it doesn\'t arrive you can contact the forum administrator at',
Replace with the following:
'Reg e-mail' => 'Thank you for registering. Your password has been sent to the specified address. If it doesn\'t arrive you can contact the forum administrator.',
To use a contact form, you'd need to do a bit of modding on your own. You might either modify PunBB's built-in email form, modify one of the bajillion free contact scripts out there, or write a simple contact form from scratch.
Looking for a certain modification for your forum? Please
take a look here before posting.