lol the art of modding lol, Battlefield was made so you can mod it, its got a mod folder to put the mods in lol, as long as some one has the exact same game version and mod type they can play and PB will support it.
Jo on the other hand is a worthless POS for the modding community, you can do the same basic things with BHD, change your crosshairs woooo lol, the shame in it all