So far mods have all worked perfectly in Saints Row IV, modding this game is super easy and the minimum quality requirements means all the mods are great, highly recommend it. The aussie version seems to have all the content aside from the rectifier and the one mission, if you do get it make sure to make a backup before installing any mods, as it makes uninstalling the mods super easy (either manually delete all the files that shouldn't be there or delete all of them except the folders then copy the backup's files)