Doron: You will find lots of style info on PSR styles (including Middle Eastern/Oriental) at:
http://launch.groups.yahoo.com/group/yamaha-psr-styles/


The group maintains an archive of styles at:
http://www.spectromagic.com/psrgroup/


Specific to your request, oriental styles are in:
http://www.spectromagic.com/psrfiles/15.html