dshugar-
To insert an image from your computer, you can click "go advanced", then "manage attachments", then click "choose file". At that point you should be able to select a file from your machine. Once the file is shown you can click "upload file" and it will be posted with your text.
Like this; 20mm Russian F2.5 lens, working aperture unrecorded. Pentax K mount lens using dedicated UV filter and Fuji Astia, roughly 2004.