Go to the Trailcams & Pics section and read the first two pinned topics. A general rundown is
www.photobucket.com open a free account. Upload pic to photobucket. Underneath you will see http// ( I think is the second one down ) under the picture. You will need to copy this link. Then start desired topic, type in text and click the add picture icon and paste the link in the pop up window.
I also think Tndeer has its own picture server now.Good luck.