Show Preview Pane on the left of a lister instead of the right?

I was wondering if it's possible to make the Preview Pane appear on the left of a lister instead of the right.

So, when I click on the "Toggle between vertical/horizontal layout, the Preview Pane appears on the left (and everything else to the right of it... that is, the folder tree, the files list).

Thanks,
Rob

It can only be on the right or the bottom. (Or in a separate, standalone window, of course.)