1. Download IR Shell 5.0 http://rapidshare.com/files/224894385/pspirshell50.zip
2. Extract the file using WinRAR or any other extractor.
3. Put Your PSP System in USB Mode
4. Place the IR Shell Folder in the PSP ms0 root. [The root of your memory stick]
5. Make a folder in ms0:/PSP that is Named GAME150. [Might already be there]
6. Place the IRShell and IRShell% folders in there.
7. Exit USB mode and enter recovery mode.
8. Click Configuration.
9. Toggle Homebrew Kernel to say 1.50 [SO it can run 1.50 Homebrew]
10. Exit USB Mode
11. Now Run the IRShell folder on your PSP That is Green.