Step 1: Download the files from below andextract te files till you see the MultiMan.PKG file. Plug in your USB and format it to Fat32b Right Clicking on it in Computer, (My Computer Windows XP) and selecting format and quick format to Fat32.
Step 2: On the USB create a folder called packages and place the MultiMan.PKG in this folder.
Step 3: Take the USB and plug it into your PS3 and go to the Game section on the XMB and locate Package Manager and select Install from Package Folder and select Multiman and your done. If your Running Rogero or Arch CEX Base, Open Multiman and Select Install Package Files, Hit X on mmss...pkg and then TRIANGLE to install it on the XMB, On the Game portion of the XMB, hit TRIANGLE and press X to install and wala