you have to make an account with like photobucket, save the pic you want to ur desktop and upload it to photobucket and copy the direct image link to whichever thread you want to post.
Once you've put your photo in photobucket or where ever you like to store your images (like Flickr, etc) and then click on the icon in the message window that looks like a yellow square with a mountain on it. Paste the URL of the image in the little box that pops up. It's really easy. Message me if you need more help!
Miss~ where's that icon? I get nothing like that, or I'm seriously blind!
When you're typing your message, it's right above the area where you're typing. I don't know what it looks like on the WAP site, but this is where it is when you're on your computer. It looks like this: