Open Photobucket in a seperate tab and navigate to the desired image.
For Firefox, right click on the image and 'copy image location'.
Internet Explorer is not your friend as it is more complicated. Again right click on the image, and at the bottom of a long list, some of which is greyed out, select 'Properties'. A little pop up then appears and select all of the address and hit the control key and the 'C' key together. This does the same thing as the Firefox command and pastes it into your clipboard.
Then select the Talkmog tag and write your post.
In the 'Posting form', hit the fourth button. They go 'Smileys', 'Webpage links', 'Email links' 'Enter an image'.
Press the 'Enter an Image' button and from the top, select 'Insert a non-floating image' (you can play around with the others when you've got this bit right!). Then you get a screen that says, 'Enter the complete URL for the image you wish to display'. Then press the Control key and the V key together and this pastes in the contents of your clipboard.
Doing this with donaldosaurus's latest image should give the picture, like this:
If you preview you get the image so you can check, and if I swap the square brackets for squiggly ones, you should see that the image must end in
dotjpg and the exact form the button and process should give.
{img}http://i448.photobucket.com/albums/qq205/talkmorgan/IMG_1939_zps76757c91.jpg{/img}
I'm not a geek, honest...