Dear George,

According to my information it is not possible to put an arabic kit into an X4. Theres only an upgrade 3.2 or for the X1!
Watch out with this information !

you can use the styles, the arabic sounds and the percussion without loading the operating system. Some of the features like tempo changes on the volume buttons and endings on the fade out button won't work but all the sounds and styles do work exactly the same. I actually haven't tried loading the X1 oriental operating system into the X4 but tomorrow I'll try it and tell you if it works.
George kaye

George,
Were you able to test if the X4 accepts
the "X1 Oriental" operating system?
Any limitations?

No I haven't tried it yet, I will Wednesday at the store. I just forgot all about it this week. Sorry!
George