Easy Lionel,
like this:
You had already done the hard part.
The next thing to do is click on the far right panel on the Photobucket page next to the letters IMG
It will then say "copied". It's now in your clipboard.
Go to the posting you're writing, put the cursor where you want it and type "CTRL-V" ('insert' in MSnot) - or right click/paste, and walla. It's there, done & dusted!