Because I saw this topic pop up in my email notifications, I loaded up my oldest VirtualBox install of UBB, which is from UBB.threads version 6.2.3, Release March 4th, 2003. I did not notice a user number listed on that page at all. Maybe my install was modded out, since the user numbers could be found on the View Profile page, User List, hovering over the user avatar, or any other numbers of ways. Or maybe it just was never there? Who knows.
But the entire point of your post is that you want to add that bit of information to always be displayed on the post page. So here goes!
For "user info on side" template:
in /templates/default/post_side.tpl
FIND:
{if $postrow[post].Location}
REPLACE WITH:
User # {$postrow[post].userid}<br>
{if $postrow[post].Location}
There are two locations within that file. One is for the mobile view, and the other is for the desktop view.
If you wanted to add it to your post_top file, the procedure is the same, but its only in there one time.
that file is: /templates/default/post_top.tpl
Edit the "User # " text as you desire.
And thats it. Cheers
