the way i upload pictures it, on the top right of the screen is says "explorer photo gallery". click that.
next screen below the same spot, it will say "upload photos" click that.
you will see five boxes that say "browse", click on one of those, and find the pic in your computer. you might need to re-size the pic....maybe. let it upload, and find them in "my photos" located in the banner, and use the code it provides. copy and paste it to your thread.
thats the way i have always done them. i am sure there is a simpler way, but this is the only way i know.