New nfo thanks to a mystery man who share with me (want to remain uncredited and anonymous)
(1) Move PSARC.EXE + zlib.net.dll to \USRDIR\build\main\ of your UNCHARTED 3 GAME DATA folder (not the one included with this package)
(2) Extract ALL *.psarc's into the folder they are already in (\USRDIR\build\main\) on your HDD by dragging each .PSARC file onto PSARC.EXE (delete the .PSARC files after you have extracted them to folders)
IMPORTANT: When you unpack bin.psarc it creates two folders - empty bin folder and one bindc1 folder with files. Rename folder bindc1 to dc1 and put it in the \main\bin\ folder so it looks like this: \main\bin\dc1\
(3) Now, merge included USRDIR folder with the existing one where you extracted your psarcs. OVERWRITE all files when prompted.
(4) Transfer to your PS3, load in Multiman, launch from XMB.