Hope this is OK, but I was PM'd by someone who didn't really understand how to link images from photobucket to the forums so I will elaborate on that.
Anyway, assuming that you have uploaded your images to photobucket your first step to getting the images onto the forum is to log on to photobucket, once logged on select albums and upload from the my albums menu.
From the list of albums on the left, select the album that contains the images you want to link to, you should see the images in that album being displayed on the web page.
Lets assume that I want to display the second image (my transalp with Ben Nevis in the background) within the forums.
I simply move my mouse so that it is pointing to the image and you should see a menu drop down below it like this.
The section I need is the IMG code (highlighted in red),

All I do is click on the highlighted text with the left mouse button, right click in it and select copy (depending on the browser you are using you may not need to do that). That copies the following text into my clipboard
PHP Code:
[IMG]http://i285.photobucket.com/albums/ll68/steved1969/How%20To/demo.jpg[/IMG]
In the forum all I need do is paste that text (right click and select paste) and by the power of modern technology everyone can then look at the image and ask, why did he not park further to the right so as not to get the wall in the shot?