Me being a programmer, its not THAT trivial to impliment. What you see on that bullitin board is a 100% dynamicly driven site. EG: the pages are generated from a database every time a person looks at the board. This discussion form is different, It creates static HTML files for each message and keeps track of what message was replying to what.
It would be easier to switch to a live database programming construct than to add in funcionality for profiles on this message board. Im not saying it can't be done :P
