Simple thread layout

[Mantagama]

This is probably a common modification, but I have never seen a thread about this here.

The posts in threads are seperated now with headers for the time of the posting. Can all posts be one huge table, like in for example phpBB? I also wonder if it's possible to make the border go through between the "alt1" and "alt2" (the row with user information and the post itself, when using the standard thread layout instead of vBulletin layout). I know it's possible to give those rows different colors, but I wonder if it's possible to make a border there without affecting other parts of the template.

Thanks.