I have downloaded and sucessfully installed the fiblack3d pack from this site. Works great and I love the way it works!

One issue, I cannot assign any topic images to news or make any new topics with images.

Upon researching, its a theme dependent variable defined in theme.php usually around the function themeindex()

I looked and $topicimage is referred to in there a few times but never defined.
A view of the source of a posted article reveals this is what the code is trying to link my images as: <img src=""

However,
I am not a PHP expert, how do I define the topic image directory?