I have been playing around with the thought of having 2 columns in my Journal. So I digged into it, and finally I was successful. I must admit I had a headache doing this, because it involves a lot of div's, but if you have a little patience you'll make it work too.
What you need is a large container. A box to put your stuff (columns) into. This container has to be filling up the entire width of your Journal. This is the CSS:
position: relative !important;
vertical-align: top !important;
height: 250px !important;
You can ofcourse adjust the parameters to suit your needs. Especially the height is important. Play around untill you get it right.
Now you have a 'box' to add your columns into.
The left column consists of the following CSS:
position: absolute !important;