Its good to know that you want to post resource with photo. We already have that facility. While posting the resource for submission one check box will be there which says "I want to add an attachment with this resource". You need to check that check box. After that you can browse for photo form you computer and upload it. Then you need to give meaningful name to that photo. After you press submit button, you will get three links, you need to copy middle link in your article.
In already posted article also, there is link called attachment in the top. you can click that to add your photo. I hope this will help you