Sorry to derail the thread a bit, but uploading pictures to this site is embarrassingly simple.
First you click on the button marked Manage Attachments, highlighted here by the red arrow. Then you browse for the file you want to upload if it's on your computer, or enter the url (the link you're putting in the [ IMG ] [ / IMG ] tags but should not be doing) where it says Upload File from an URL in the Manage Attachments window. Then you click the Upload button. Repeat this process for each picture you want to share. When done, click Close this window in the top right of that window. Enter the text of your reply as you normally would, and hit Submit Reply as you normally would. Your images will show up as the three tutorial images below have done.