A little modification to unlock the master league hide players 1-5.
You can find them in edit mode | players -> others
Instruction dt04.img :
just copy the dt04.img to KONAMI/PES2010/img. Don’t forget to backup your old file !
Or For kitserver unnamed_7.bin:
copy unnamed_7.bin to KONAMI/PES2010/kitserver/img/dt04.img
Thx to EPT-Team for the last year Tutorial