Tray Tooltip

I really like Weather Watcher, especially the relatively small amount of memory it uses. One feature I would really like, however, is the ability to have more detail in the Tray Tooltip. The 64 character limit imposed by Windows is, in my mind, a problem. Would it be possible–or is it already possible and I am missing it–to use html for some sort of tip when a cursor is placed over the temp icon? This might even be added as an option. It seems to me that this holds the possiblity of not only adding more information but also making it more customizable. At the same time, if it is going to add a great deal to WWs memory usage it would not be worth it.