CONFIRMED WORKING - INSTRUCTIONS BY VAPOCHILL
WHAT YOU NEED
UMDGEN V2.00
FAKEUPDATER
FIRMWARE 2.00 EBOOT
MPHGAMELOADER
UMDEMULATOR V0.8C
GTA ISO
UMDGEN
OPEN GTA ISO
EXTRACT TO GTA ISO TO FOLDER ON HD
SAVE A FILE LIST
CLOSE UMDGEN
DECRYPTPRX
COPY PRX2_0_0 FROM GTA FOLDER ON HD ONTO THE ROOT OF MEMSTICK
PUT DECRYPTPRX INTO GAME FOLDER
RUN DECRYPTPRX
COPY PRX2_0_0 FOLDER FROM ROOT OF MEMCARD INTO GTA FOLDER ON HD REPLACING ORIGINAL FOLDER
REMOVE ALL .PRX FILES AND THEN REMOVE .DCR EXTENSIONS FROM REMAINING FILES.
UMDGEN
DUMP GTA FILES BACK INTO UMDGEN
OPEN THE SAVED FILE LIST
CREATE A NEW GTA ISO
DUMP GTA.ISO INTO ISO FOLDER ON MEMCARD
FAKEUPDATER
PUT FAKEUPDATER ONTO MEMSTICK
PUT 2.00 FIMWARE INTO FAKEUPDATER/UPDATE FOLDER
RUN FAKEUPDATER
YES TO FAKE UPDATE TO 2.00
YES TO REMOVE FROM MEMORY
YES TO DO YOU WANT DECRYPTED FILES
NOW DUMPS F0 TO MEMORY CARD IN UNENCRYPTED FORMAT
YES TO DUMP F1 TO MEMORY CARD
COPY F0 AND F1 FROM MEMORY CARD ROOT TO MPHGAMELOADER FOLER THEN RENAME THE FOLDERS TO flash0 and flash1
UMDEMULATOR
RUN UMDEMULATOR
SET SYSTEM MENU
SELECT GTA.ISO
RUN MPHGAMELOADER.....
WORKING JUST FINE

)
Hope this helps and sorry for the caps.
Vapochill