Not sure. Depends on what you are doing. LOL Here is how I do it. Go to the picture you want to link. Right click on the picture and click "properties" . Copy the address URL for that specific picture. Then insert into BHC the same as you insert a regular picture. Just remember you don’t want to link the webpage that the image is on. You want to link the address of the actual picture.
If you use the "insert image" icon (with the tree) you don't need the image tags. It does it for you. Either way will work though.