Sorry can't be much help with s3pe, I search by name then just extract the files with the same name, you can hold Ctrl down to speed up selecting the files and extracting them all together.
As for adding them to Packaged worlds, once you have exported your world, you should test the world in the game, just to check the graphics have changed. If all systems a go, then there is no reason I can think off, why you can't then upload the world with the custom rabbit holes. You must remember it will increase your upload size, but that the only downside I can see. Oh and you might get a hundred question on how you did it :lol: ....
If you do this, please post a link on this thread, it will be a good example, should anybody else wishes to do this.
The custom rabbit hole you made looks very good :D
