I have just purchased Active Forums and installed. The default theme is pretty dreadful and I cannot see any way of changing it to something professional.

How can we use the theme that is being used for this forum?

The default theme was intentionally designed to be minimalistic, so that it would not stand out too much from most site skins. Everything is customizable with html and css.

Here are a few guides:

http://www.activemodules.com/active...site-skin/
http://www.activemodules.com/Deskto...achid=7264

The theme used here was a custom theme designed to match the DotNetNuke site. We have not made it available for release at this time, as it requires some advanced customizations.