Sorry Peter, did not mean to ignore you, just a bit involved at the moment and I forgot to get back to you.
As JC says, you need to upload your pics to a free photo site and , once there, you must be prepared to leave them on, otherwise the picture will be deleted from this site. Also reduce the size a little as, if you do not, it will not fit on the screen and makes it a pain to read your message.
Once you have the picture on the site of your choice, point to the picture and click your right button on the mouse. This should bring up a panel with "Properties" in it. Click on properties and copy the line of text that includes the picture title and the .jpeg using "Control and C" keys.
Come back to this board and open the message screen.
Write your message then, when you get to the bit where you want to put the picture click on the "Img" tag just under the "Subject" heading.
[img] will now appear in the body of the text. Point close behind this and hit "Control and C" keys. The details of your picture will now appear.
At the end of the line of text, go back to the image tags, "img" should now have a * behind it. Click this and it will apear in the text of your messsage [img*]. Job done.
Sounds complicated but after you have done it a few times its easy. It took we all of three weeks to work out orignally, with lots of help from Oscar and Emiel.
If you would like to practise, feel free to go to my Web Site and copys some of the pictures to your message. There may be some of your pictures on there still.