go register for a free account at photobucket...

upload the photos you want to display there first.

After that, there's a couple different ways to do it: you can right-click on the photo (after it's hosted at photobucket) and copy the address and come back here and paste it between these.. . Type them EXACTLY like that.

You can also copy the URL which will be displayed underneath the pic, come back here and left click on the far right icon above the text box when you're posting (it looks like a couple mountain peaks with a yellow sky and a sun in the upper right hand corner). That'll give you a pop-up box in which to paste your URL and will insert it into your post for you...