Look you can use a newer firmware :
S500_R8BE001_MAIN_GENERIC_LY_RED52
S500_R8BE001_FS_AMERICA_2_RED52
HB1-06_Gen_CDA102568_107_R6A_GENERIC_AMERICA_2
or
S500_R8BE001_MAIN_GENERIC_LY_RED52
S500_R8BE001_FS_AMERICA_1_RED52
HB1-06_Gen_CDA102568_106_R7A_GENERIC_AMERICA_1
It depend`s what languages you want one your phone.Can I use this one: S500_R6BC002_FS_CENT_EUROPE_RED52.fbn and S500_R6BC002_MAIN_GENERIC_LY_RED52.mbn?
Nice day