You had it right -- that works for the front page, but when one is going to reply to a post, it still shows up in the opposite order.

Yes, I forgot this one: includes/entry.inc.php, ~ line 140:

replace
WHERE tid = ".$thread.$display_spam_query_and." ORDER BY time ASC
by
WHERE tid = ".$thread.$display_spam_query_and." ORDER BY time DESC

Alex