Jintek said everything.
The only thing about MotionInJoy who sucks is, you must have an internet connexion to work (new versions of the software).
I didn't find how to emulate drivers in LAN (i wanted to play SMB during travels, but didn"t make it with MIJ
There is an another software you can use, but don't remember his name.
You can bind every key as you want (loading x360 profile and binding with your ps3 pad).
Maybe someone can drops the name.