This gives the table a top and a bottom (though it's not terribly elegant):
| cell one | cell two |
|| cell three | cell four ||
[tr][td][hr]| cell one | cell two |[hr][/td][/tr]
[tr][td]| cell three | cell four |[hr][/td][/tr][/table]
Ya know, back when I made my own silly blogging website and I couldn't get the code to do what I wanted, I just made an image of what I wanted it to look like, in whatever program I have (a combination of paint/word, photoshop, etc.). If I needed something like text to be linkable I would make multiple cut up images and just squish them together to look the one whole image with different links when hovered over with the mouse.
Of course that might be just way too much work for what you needed, but maybe that suggestion helps a little.