If you have the capability, you should see an "Attach" prompt when you click on the "Additional Options" tab just above the "Post/Preview" buttons at the bottom of your reply to a post ... if not, send and email to Dunrobin (or query him on the "Questions and Answers" Thread) and ask him how to get this capability accessed. I have noticed that on this particular thread, even I do have the "Attach" button available, so it may be a configuration/starting a new thread/mumbo jumbo that I'm not aware of. Best to go to the boss, Senior Dunrobin, and ask him.