I want to post a JPEG image from my computers picture file to a thread. Please refer me to or give me detailed instructions for the process. Thanks.

Very easily.. When posting scroll down below the SUBMIT button and you will find the UPLOAD ATTACHMENT section. Click the CHOOSE FILE button and you should see a list of files on your computer - find the file and select it. Then, you can add some comments to the file if you and click ADD THE FILE. It will then be uploaded. The file is NOT yet added to the thread though, Below the box to enter your text there is an ATTACHMENTS dropdown. Select the one you want (because you can add multiple) and click PLACE INLINE and then the image will be placed right into your message.

Hopefully that helps. If not, let me know!