Hi tim...every thing you did so far was right....just remember that if you don't resize your photos to around 160kb then the auto resizer on here takes an age to do so.........I I always resize all mine down to that size......
once the host button is pressed you'll come up with a pop up saying copy to ( three different locations).........choose the middle one,
right click and it will come up with another pop up saying allow access........click this, then
again press your mouse with right click ( I think) and paste your picture.................if you need to paste mote than one pic on the same thread, press preview at bottom of the page which will then show the picture in situ, and then start the process again on the next picture. neil........it's a bit complicated till you have done it a couple of times and then unforgettable, lol