Never mind, already figured out how to override it, by editing the addpost.pl where it updates the title, now I exclude "Administor" and "Moderator" from updating.
If anyone is interested, here's how it's done:
change
if ($NewTitle ne $CurrTitle) {
to
if (($NewTitle ne $CurrTitle) and ($CurrTitle ne "Moderator") and ($CurrTitle ne "Administrator")) {
and replace "Moderator" and "Administrator" with what you want to be ignored during title updating. That should do it.
