Can some one help: I am talking self wordpress posts order question. I used to change the post time to force it move to the top but this way it will change the old post link URL. My question: how to move an old wordpress post to the top without changing the post's time? Can it be function like forum sticky thread? Thanks/ Regards
You should change your permalink structure so changing the post time wouldn't change its permalink. For it to function like a forum sticky thread, it would either have to be supported by the theme you are using, or you'll need to code it in yourself.
What you're trying to do here is called a sticky post. It requires no programming as long as 1) you're using WordPress 2.7 or later, and 2) you're using a sticky post-friendly theme.