Down underneath all the smileys and emoticons there's a spot that says manage attachments. Click it, then click browse to select the picture you want to post. Then once it's selected, click the upload button to the right. If it's too big, you can open the file in mspaint and resize it, then try again. If that's too complicated, then open a photobucket account and upload pics there, then paste the links here.
I'd love to see the new creations!