WRONG. The easiest way is this. Go to the skybubble, and overload it with trip mines. If you don't understand what I mean, overloading is setting an equipment to instant respawn and using it over and over again. Eventually, you'll get to a point where the lines in the skybubble dissapear. When they're gone, you can easily move things around in the skybubble without the limitations of the lines. The only problem though, is that you will have to use the save and quit method to get items to float there. When you quit, the lines I believe will return, and you'd have to redo everything to get items to float.
I'll try to get you a link that explains with pics.
Click here
Enjoy.