Hi There
Okay when you are looking at your pics on photo bucket click on the photo you want to add and u will see some links to the right of the pic that say:Share url...direct link etc:
Click on the img code-forums bulletin boards. Then right click and then go down to copy.Then come back to the new thread that you want to put it in and right click again and go to paste. It will then show the link.
You can check to make sure it worked by clicking preview at the bottom of the page and it will show you the pic in the thread...
That is it..
