Welcome aboard, John.
The red x instead of pictures indicates that the pics cannot be found ... probably stored on your computer. In order to post them, you need to put them on a photo service like photobucket. Then you copy the URL for the image into your post. the image URL will be listed under the photo in your photobucket album.
It will look like this in the text of your post:
"[xMG]http://i45.photobucket.com/albums/f81/misterb-3607/my%203607/c57ffee5.jpg[/xMG]" (without the quotes, and with IMG instead of xMG at the beginning & end)but will display the image.