To avoid the private.php edit:
private_complete
PHP Code:
if ($_REQUEST['do'] == 'newpm')
{
$checked['savecopy'] = ($vbulletin->userinfo['advpmoptions_savecopy'] ? 'checked="checked"' : '');
$checked['receipt'] = ($vbulletin->userinfo['advpmoptions_receipt'] : 'checked="checked"');
$checked['deleteoriginal'] = ($vbulletin->userinfo['advpmoptions_deleteoriginal'] : 'checked="checked"' : '');
}
Also, doesn't this cause problems when you change the default selection and hit preview?