Last I heard [MENTION=69859]KaineBennett[/MENTION], has said that he owns full rights to RC engine and is selling it. Though I do not know if he is selling anymore.
After you rate a player up have it insert into a db $thisuser rated up $thatuser and then call to that table, if there is an entry for you rating up that user echo "You have rated this person today" and then die($h->endpage()); then truncate the table with your day cron/day timestamps.
Look in the original code. The rate down is written like I posted for the rate up.
Not to say that it's not wrong. I just adjusted for how it was written in the code.
In the code for rating up it has a line that says this:
$db->query("UPDATE `users` SET daily_rating = 0 WHERE userid = {$userid}");
Change that to say this:
$db->query("UPDATE `users` SET daily_rating = daily_rating-1 WHERE userid = {$userid}");
Just did change from ereg to preg_match on one of my testing sites, wasn't difficult. Idk why OP is having so much trouble, [MENTION=65371]sniko[/MENTION] gave you everything. Even wrapped it and put a bow on it for you.