You will need knowledge in electrical engineering.
1) Buy MemoryStick open NAND (Chinese) (NOT MONOLITH!).
2) Buy NAND Flash TSOP-48 programmer.
3) Unsold NAND.
4) Connect NAND to programmer.
5) Reading NAND.
6) Overwrite MemoryStick ID (msid) area (offset 1E0 - 1EF): 204D5350534E593000788884C6AA0000.
7) Disconnect the NAND from programmer.
8) Sold NAND to base card.
9) Download archive: Link Coming Soon
10) Fromat MemoryStick.
11) In the folder IPL to MS launch "install_psp_ms_multi_loader_ipl.cmd".
12) Connect PSP to PC.
13) Print "Y" (Inject IPL).
14) Copying allfiles from folder Extracted Files Original in PSP (MS).
15) Complete! =)
P.S. I`m attached corrected MemoryStick ID area.
P.P.S. If you decrypt files from PRX folder, you very helped my. If in my all will, we get no hardware method.