I'm using :HB1-06_Gen_CDA102568_104_R10A_GENERIC_HONG_KONG custpack at the moment. It should be fine shouldn't it?

Here are the firmware files that I used.

W580_R6BC002_MAIN_GENERIC_LA_RED52.mbn or W580_R6BC002_MAIN_HONG_KONG_LA_RED52.mbn
W580_R6BC002_FS_HONG_KONG_RED52.fbn