Ok on Photobucket, which is what I use, when you're viewing your album, and you hover your mouse over a pic a raised section will open up around it and give you options as well as a list of links.
Copy the one at the bottom that says IMG CODE, and paste that into your thread. It's the one that looks like [ IMG] url [/IMG]
Love the Buckeye Burl. I have a set of scales that I'm itching to use but haven't yet.