When you are creating a new post or modifing an existing post you will see under the post box " Attachments and other options " if you click on that it will give you the option of uploading pictures. If you have them on a web site (photo snap) above the post box first icon in the second row will put the image commands into your post and then all you have to do is past the link inbetween the commands.
Do you understand, first time tring to explain it.