More importantly, how do you get a link to show the EXACT message you want it to? I can only do by thread.
There is a little tiny icon next to "Posted:" in the message header (see:
) just to the right of the posters name that that you can right-click on and select "copy shortcut" (or "copy link" depending on your browser). That will take you straight to a particular post rather than the start of the thread.