Maybe these screenshots will make it easier...
Step 1. Upload the image to your TriumphRAT.net Photo Album or
or PhotoBucket, or WebShots, or whatever Internet site you want to use.
Step 2. Select the image that you uploaded in Step 1 from the photo album and copy the image's URL address...
Step 3. Using the "Image" button specify the URL address to "insert" the image in your post...
