Your on-line procedures are WRONG, the procedures you give to your Technical Support are WRONG, and Believe me I have a Company that make Technical Assistance from 27 Years.. So your staff tried many times by phone to fix the problem of change the region for use Thai Inks but they failed because the procedure they have is wrong in many points.. Only when I have given the Printer to the Technician in your Office they can insert the new region code, but is impossible with EVERY driver I have tested on Macintosh and Windows.. But they solved very quickly in their office. Thanks