How I do it:
Step one 1: Choose a picture
Step two 2: Make an photobucket.com account (if you don't have 1)
step three 3: Press upload pictures
Step four 4: Choose your picture and download it.
step five 5: When it's done you would have to press the mini picture to get it into a bigger size, then you can right click and press copy imageadress
Step six 6: Press in the BB codes and copy+paste it between

Step seven 7 : ENJOY!