I would recommend Extortion GTA V SPRX
You will need multiman / Filezilla (Optional)
Once you you have these you will need to go into multiman and into file manager
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After that click onto PS3 Root. Now HDD0 > game > find your bles / blus code of GTA V ( should be on spine ) > USRDIR and drag the EBOOT.BIN here
For the SPRX click on PS3 Root again now go to tmp and drag the .SPRX file here
Load up GTA and you should have a menu ( R1 and right to open )
(Remember to go onto the CEX folder)
Files you need -
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Since you're on 4.70 I don't know if the 4.66 will work
I may be missing something / Have spelling errors but whatever