here is a quick guide about how to insert pictures into your posts.
First you'll need to put your pic up somewhere on the internet; at www.photobucket.com
or on your fb account for instance.
Write your post and
then you just need to copy and paste the link from the 'direkt link' space on photobucket into the 'image url' space in the window that opens when clicking on the small bottom with the tree on the toolbar .
if your picture is somewhere else on the internet just right click onto the picture and copy the 'image url' link and then proceed like described above