Changing the forum images for each forum is explained here. If you find this advice useful, why not consider making a donation for the time and the advice:

Here is how to do it:
Step 1:Create a folder within your forum web directory. Name it forum_icons
Later on this is where you will be placing your new forum category images. By creating a new folder you are keeping things neat and simple, and also protecting your own forum from changes that can be easily undone if you don't like the application.
Step 2:Locate the file in the forum directory called forum_status_icons_inc.asp
You will find this file in the includes folder of the web wiz forum directory
MAKE A BACKUP OF THAT FILE first. It will be easy to undo any changes if you get stuck!
Then using a text editing program, open the original file includes/forum_status_icons_inc.asp
Where it says:
'Display the topic status icon Response.Write("<div class=""topicIcon"" style=""background-image: url('" & strImagePath & strForumIconBgSrc & "." & strForumImageType & "');"">" & _ "<img src=""" & strImagePath & strForumIconSrc & "." & strForumImageType & """ border=""0"" alt=""" & strForumIconTitle & """ title=""" & strForumIconTitle & """ />" & _ "</div>")
%> |
Replace this with:
'Display the topic status icon Response.Write("<div class=""topicIcon"" style=""background-image: url(' forum_icons/" & intForumID & ".png ');"">" & _ "<img src=""" & strImagePath & strForumIconSrc & "." & strForumImageType & """ border=""0"" alt=""" & strForumIconTitle & """ title=""" & strForumIconTitle & """ />" & _ "</div>")
%> |
Uploading the changed file will cause all the existing forum icons down the left hand side not to appear, but don't freak out. Here is how to start replacing them with your own custom icons.
Step 3 - The images (you can always do this before you commit Step 2 so when you do upload the new file, the changes will be instant)
If you look at the forum homepage you will see (in this case) that we have changed the images down the left hand side, as shown in the image below -

I've highlighted some of the forum categories to help explain how to do this. If you hover the mouse for example over Free Downloads you should see down the bottom of the browser, the page address. It will be something like www.mywebsitename.co.uk/forum/forum_topics.asp?FID=45
Ignore the number I've put here (45), because you will see a different number on your forum, depending on which category you have hovered over, but this is the starting point. Each forum that you have created will have a unique FID or ID number, but for the benefit of explanation, we are looking at this one example. So, now you know the forum FID number for that specific forum, let's create the new image to go with it
Each image MUST adhere strictly to the following -1. They must be no larger or smaller than 35px by 35px
2. Preferably saved as .png format or .gif (if you save them as a JPEG then that means that if your are running a forum skin it will look stupid) so save them as a transparent png or gif. I prefer png formats - easy to work with
3. Each image must be saved with the forum FID number - in other words in our example Free Downloads is FID=45 so I saved this image as 45.png
4. Each image should have a UNIQUE number to correspond with the FID number, and as you save and create each image, save it to your newly created forum_icons FOLDER
When you have finished, in that folder you will have something like this:

As you can each image is specifically numbered according to the individual FID number.
Upload the new images and enjoy!
If you have any issues you can always ask, and if you found this information helpful, why not show your appreciation by making a donation