1) Download the PSP firmware updaters for 6.31 & 6.61 (for PSP Go! 6.31 & 6.61) and rename them 631.PBP & 661.PBP (if they shouldn't already)

2) Download the two archives from the Infinity Release Page and extract them

3) Connect your PSP via USB to the PC

4) Copy all the MAKER, FLASHER and STAGE folders to the ms0:/PSP/GAME/ folder

5) And add both the 631.PBP & 661.PBP to the MAKER folder.

If done correctly you should now have these 3 programs on your PSP

6) Start the 6.61 Infinity Firmware Builder

7) Let it do its magic..

8) And once the process has finished Press to exit back to the main menu

Note: This DATA.MFC is unique for your device. Never use this file on a different PSP!

9) Reconnect your PSP via USB to the PC..

.. and move the freshly generated DATA.MFC to the FLASHER folder.

Alternatively you can of course use PSPFiler or any other homebrew if you like!

10) Now start the 6.61 Infinity Firmware Flasher

11) Agree to the terms if you are aware that there still is a chance of a brick whatsoever!

12) And once its done Press to reboot into 6.61 Infinity!!!

Note: Your settings will go corrupt and be reset, that's normal!! Just skip the bluescreen by pressing and re-setup language, username & time/date.

First step done! You are now running the 6.61 Infinity Hybrid Firmware!

1) Download the 6.61 LME-2.3 Custom Firmware and extract the ZIP-Archive

2) Copy the installer and launcher folder to your PSP/GAME/ directory

3) Launch the LME Installer for 661 from the XMB and install the CFW like normal

4) To activate your CFW, now run the LME Launcher for 661 from the XMB (this needs to be done once)

1) Download the 6.61 PRO-C2 Custom Firmware

2) Extract the ZIP-Archive and copy everything to your "PSP/GAME" folder

3) Run the 661 PRO-C Updater from the XMB and install the CFW like normal

4) And once the process has finished Press to activate the CFW and return to XMB

13) Now the last thing you need to do is start the Bootloader Config to set up the autoboot into the Custom Firmware you just installed.

14) Go to the left to view the Configuration settings for Infinity. All you need to do here is pressing to enable the selected custom firmware for autobooting.

Optionally by going to the right, you can check for updates and download the newest version of Infinity directly to your PSP!

Done! You are now all set and your PSP is perma-patched!

Special thanks to Darthsternie for the screenshots