You can post your images on the Forums quite easily, iag48 give it a try!
To attach your file to a post, use the Manage Attachements button found under Additional Options, which you'll see when you click 'Reply to Topic' or 'Edit Post' (it's like a little paperclip). When you click on it, you'll see a pop-up window which allows you to manage your attachments.
Under 'File to Upload' click the Browse-button, find the image you want to post on your computer and click 'Choose'. If you want to add other images as well you can do, up to a maximum of five per posts. Make sure of course they're below the file size limits that are listed. Then you can click the 'Upload' button.
A message will appear to tell you the files are uploading, and after a short wait (which will depend on the size and number of files you're uploading) your image(s) will appear under 'Current Attachments'. You can now close the window, complete your post and when when you click 'Submit Reply' your image(s) will appear with your post.