Nothing?:(

i am been reading this thread:
how to patch K750 CID36 RED with FAR - Top Sony Forums

and they say that i only need to patch may phone with a custpack, but witch one?

K750i_CDA102337_10_R5A_Generic_EUROPE_2 05-17-2008
K750i_CDA102337_11_R5A_Generic_EUROPE_3 05-17-2008
K750i_CDA102337_12_R5A_Generic_EUROPE_4 05-17-2008
K750i_CDA102337_13_R6A_Generic_EUROPE_5 05-17-2008

the more i read the more confused i become lol

if anyone help i will really appreciate:o
Cumps