Hi BB. If you want to post pics, first, make sure they aren't too big! Up to 800x600 is fine. Then, in the 'reply' panel, you will see a 'button' labelled 'go Advanced.' Click on this. A window will appear, with five 'buttons' marked 'Browse'. Click one button, select the file you require, then select the picture you require. Once you've done that, click 'Open'. Repeat until you have the pics you want, up to five, then, click 'Upload'. A message will appear 'Uploading etc.'.
If you want to add more pics, wait until the first batch have uploaded, and the 'Browse' panels will appear again; repeat the above exercise. When finished, close the window and, if happy with the text of your message, click on the 'Post Reply' button.
Hope this helps.
Terry.