transmenu out of browser workspace

[bbant]

I have virtuemart 1.1.2 running on joomla 1.5.8 on the rhuk_milkyway template

I have a vertical transmenu displaying the product categories in the left column

In some of the categories there are a lot of subcategories. Which causes the submenu to be long and a couple of the last items are not viewable because the browser workspace is small (you'd have to scroll down to see the other subcategories).

Is there a way to display the submenu (or subsubmenu for that matter) a bit higher so that all the subcategories are viewable without scrolling down?

Any help would be appriciated