Probably the best way is to look in your public_forum_summary.pl file and find:
[/code]You'll notice that it's inside a Table Row. Just a few lines down you'll see "$name_link" and just under that you'll see "$TheDate" and "$LatestTime". All 3 will need to be inside the same Table Row.
For myself I just stripped out the codes between "<tr>" and "</tr>" tags in "my $name_link" all but leaving "$this_last" in place. Then I use the:
[code]
For the LastPost column.
If you have an idea how you want your LastPost column to be (e.g., $msg_icon then $last_subject
$last_author then $TheDate then $LatestTime) post it here and we can help you with the coding if needed.