there are two functions that must be modified.
File: functions.smf.php
Functions: syncMamboToSMF & syncToSMF
syncMamboToSMF
$query = ""
." INSERT INTO {$smf_prefix}members (realName, memberName, emailAddress, passwd, dateRegistered, hideEmail, is_activated, validation_code)"
." VALUES ('$row->username','$row->username','$row->email','$row->password',UNIX_TIMESTAMP('".$row->registerDate."'), '$hideemail', ".($row->block ? 0 : 1).", '$row->activation')";
syncToSMF
$query = "
INSERT INTO {$smf_prefix}members
(realName, memberName, emailAddress, passwd, dateRegistered, hideEmail, is_activated, validation_code)
VALUES
('$row->username','$row->username','$row->email','".sha1(strtolower($row->username) . $password)."',UNIX_TIMESTAMP('".$row->registerDate."'), '$hideemail', ".($row->block ? 0 : 1).",'$row->activation')
";