Only way I do is through photobucket. Its a host website. Open free account, upload pics to accoount, then post image here using the (img) code below the pics on photobucket. You will right click on the img code of the pic you want, copy, then paste here.
If you want to upload them directly to your post check this link out, personally I like the photobucket method better. I find it's faster and easier to use http://forums.iboats.com/showthread.php?t=410147
