To add images, go to Control Panel at the top of the page after you login to the forum.
Under options on the left hand side click Gallery.
When the page refreshes a new menu option on the left will be displayed. Click on "Manage personal albums".
You can then use the upload link in the middle of the page to add your images.
Click on the "Take file name as image name" to make it easier to add images".
Then add a comment, and click browse on each image you want to upload.
Make sure you complete (all images combined) are not more than 1MB per upload or the web site will give you an error. Your limited to a 1000 images per member of any size less than 1MB.