In photobucket click on the pic you want to put on so it comes up by itself. To the right of the pic hit the dropdown arrow for image links and just click inside the box for img code. It should say copied when you do that. Then just paste it on here. Thats how I do it. In the reply box on here, right click in the box, and select paste and the whole code should be seen and hit submit
Go to photobucket and go to the pic you want to copy. Go down to the last choice it should say "IMG". Put your cursor on it and click and it should say "copied" . Then go back to HPA and go to your post. Click in the open box and then right click. A box will appear,go down to the paste and click on it. That should copy your pic to be viewed by us. It will not show the pic in your box, but will come up in your post.
When you get the Yellow "copied" image code, like redlab said, come back to this post and in the reply box, right click the top right of your mouse and one of the options that pop up should be "paste" and just left click on it. The image code will show in the box, not the picture. When you hit submit, the pic will show. Or you can email the pic to someone to post for you.