It's really just a matter of tinkering with the postlist.tpl file. All of the info is in there, and if he's comfortable with regular html and tables then it shouldn't be too hard. The author portion is held in this area:
{$lang.TEXT_BY} {$postrow[topic].Username}{$postrow[topic].UserStatus}
So, it's just a matter of moving that into it's own row, and adding the row in the header itself so the column is labeled.
