Skydog,
I upload the image to Photobucket (it's free to create an account). Photobucket gives you an http web address for the photo which you copy. When you create your post here, select the image icon at the top of the reply window and when the new window opens, paste in the web address of the image.
Hey presto, there it is!
A word of caution - you need to re-size your images before doing this! I use 800 pixels wide, which seems to fit the frame pretty well.
Cheers,
Philthy