You'll need to somehow get the photos on the internet. I suggest www.tinypic.com or www.photobucket.com. Both will do pictures up to 250 KB each.

Then, you'll have to insert the images using the . Or, you can click on the little yellow icon when you're composing a post (beside Bold, Underline, etc.). Then, type the URL into the dialog box.

Hopefully the above didn't confuse you better, since I'm not always good at explaining things to others.