need ur help guyz

hi everybody, il take nclex in saipan this april and i wish to change my testing site to hongkong..how can i do that? do i need to call them everynow and then to check if there is available slot coz we all know that hongkong is fully booked. i wanna take my chances but its quite expensive if i will call them everytime to check for availability of slots. pls help me...thanks and god bless...i need your prayers....