Jamie, I will try to walk you through it.
What I did was opened up another browser window for Imagestation. Click on the picture you want to post to enlarge it. Now right click on that same picture. Go to bottom of that list, click on properties, and then copy (Ctrl c) the url for the pic.
Open up your Garden Helper browser, click add reply, click on image, and then paste (Ctrl v) that url into the window that opens. Click ok and it should be in the post.
If I confused you, let me know and I will try to make myself plainer. Hope this helped you.
Oh, by the way, make sure when you are pasting in the window that you delete the first http://.
When I first started posting pics, Bill found that problem for me. Thanks again, Bill!