It's a Modification made by Dest. It allows you to do many things such as:
-Use two sabers at the same time
-Make any saber color you want
-Use the Double Bladed saber without cheats on
-Choose saber hilt(the handle) as you like
-Change the size on models so Desann can be tall and Yoda short
-And many more
Just one thing if you choose to download it get Jedimod 1.0 and Jedimod 1.1
Jedimod++ 2.2 isn't the real JediMod so only download it if you want it.
Just because I don't know something doesn't mean I'm stupid. It means you failed to tell me.