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December 16, 2009 •
Then GEN team pushes another update, to it’s popular CFW, 5.50 GEN-D3 that introduces several bugfixes from the previous releases as well as introduces better compatibility for games and plugins. Do note that 5.50 GEN-D3 is for hackable PSPs only. Read the Important warnings below:
If you have a PSP-3000 / PSP-2000 TA088v3 however, you can install 5.03 GEN-C.
Important: DO NOT attempt to install this on PSP-3000 / PSP-2000 TA088v3. YOU WILL BRICK YOUR PSP IF YOU DO.
Important: If you are updating from 5.50 GEN-B, you need to install 5.50 GEN-B2 before proceeding. Otherwise, YOU WILL BRICK YOUR PSP.
Important UPDATE: If you are having trouble playing the latest PSP Games, you may want to install the Prometheus-4 module or use the ISO Tool Patching guide. 
Requirements:
- A PSP with custom firmware installed AT LEAST 5.00 M33-6. Although the installer worlds on 4.01 M33, it’s better if you upgrade to 5.00 M33-6 to lower the risk of the installation failing. If you’re having problems installing 5.50 GEN-D, read the troubleshooting part below.
- PSP battery that’s at least 78% full
- Download: XGen Updater | XGen Updater
- Disable ALL plugins.
- Back up your save files (so that if they get corrupted, you still have backups)
How to install 5.50 GEN-D3 using XGen Updater
- Connect your PSP to your computer
- Extract the XGen Updater to your PC
- Copy the PSP folder and the 550.pbp file to the root of your memory stick
- On your XMB, go to Game > Memory Stick to start XGen Updater
- Select Enter on the screen above
- Choose Flash install CFW 5.50 GEN-D3
- After all process is complete, press X. Your PSP will reboot.
- Congratulations, you’ve just installed 5.50 GEN-D3
After installing GEN-D3, How about some Free PSP Games?
Custom Firmware 5.50 GEN-D3 Features:
- All features of 5.50 GEN-D2 and 5.50 GEN-D are available.
- Compatibility with games requiring firmware 6.10 and above (this includes the Demos available from the PSN)
- Play the following games, Tekken 6, Gundam vs Gundam, Phantasy Star Portable 2, Naruto, J-League Pro Soccer Club o Tsukurou 6 Pride of J, Naruto Shippuden Narutimate Accel 3, James Cameron Avatar The Game, Phantasy Star Portable 2, R-Type Tactics II Operation Bitter Chocolate, Bleach Soul Carnival 2, Battle Spirits Kiseki no Hasha, Yamada, etc.
Troubleshooting:
If you’re having problems getting the black screen when installing 5.50 GEN-D, you need to reflash your PSP to 5.00 M33-6. If you’re already using 5.00 M33-6, upgrade to 5.50 GEN-B2, then run the 5.50 GEN-D installer:
- Download: Hellcat’s Recovery Flasher
- 500.PBP | 500.PBP
Requirements for reflashing your PSP to 5.00 M33-6:
- Extract the Hellcat’s Recovery flasher and copy it to PSP\GAME folder
- Copy the 500.pbp to the Recovery folder (PSP\GAME\RECOVERY)
- Run Hellcat’s Recovery flasher from your XMB
- Reflash to 5.00 M33-6
- Restore your PSP to the original settings. No CXMBs, no fonts, etc
- Format flash1 and reset settings (recovery mode)
- Set theme to orginal Sony theme
- Turn off all plugins
- Reformat memory stick
Troubleshooting:
If you’re having problems getting the black screen when installing 5.50 GEN-D, you need to reflash your PSP to 5.00 M33-6. If you’re already using 5.00 M33-6, upgrade to 5.50 GEN-B2, then run the 5.50 GEN-D installer:
Requirements for reflashin:
If you don’t want to reflash, do the following:
If it still doesn’t work, just update to 5.50 GEN-B2 before running the 5.50 GEN-D installer.
Credits:
Dark_AleX – For his M33
Genyus – By GEN
Xcuse me i want to upgrade my psp to 6.60 pro-10 like listed,,,,i try from smallest version(6.20),,,,it says does’t support your FW (0X),,,my version from prometheus 4 and its fail,,,i change it into gen d3 also cant be used,,,what should i do?
Done successfully upgraded to 5.50 Gen-D3..
KUDOS to all who made this possible