i got an Australian s500i that i want to debrand and sim unlock

so i would use these files right ?

S500_R6AC003_MAIN_GENERIC_LY_RED52
S500_R6AC003_FS_EUROPE_2_RED52

theres no custpack for Australia now would i be able to use

HB1-06_Gen_CDA102568_12_R6A_GENERIC_EUROPE_2

and would it still work on Australian networks ?

is there any other way to do this like just flashing the MAIN with the same type as my phone ?

would that work ?

and for unlocking i would just follow this

Remove SIM-lock patch generator - Top Sony Forums

and i should be ok right