Mike,
You need to use the "reply" button on the top right of each post, not the quick reply box at the bottom of the screen. Then it gives a link in the bottom of the text box to upload pics. Hit that, then browse the the location on your computer where they are stored and it will upload them.
BTW, got my plans order yesterday and had a quick look at the Swick Taylorcraft plans. Nice plans, fairly extensive building and not as big as I was expecting. Should be very enjoyable to get into it and have the balsa chips flying.
Mark