This video shows you how to install it.
Here are some things you can swap with the changer:
Download it from here.
All the functions of the software:
The software is undetectable. You won't get banned.
Change your skin with any of the possible ones.
You can get many rare dances.
There is also an option, which gives you many pickaxes to play with.
Unfortunately, the software works only for you. Other players won't see your skins. But the changer is perfect for videos!