Team GEN has just released the latest and greatest in the custom firmware world, 5.50 GEN-D. This update stabilizes the previously buggy 5.50 GEN-C release, and so far we haven’t heard any complaints from the community. The only known bug is a problem with speeding up the MS read speed, which is being worked on for a future release.

Download: CFW 5.50 GEN-D
Download: CFW 5.50 GEN-D2 Quick Updater

This release, like GEN-C, utilizes the new XGEN installer. If anybody has trouble with it, please feel free to leave a comment and we will do the best we can to help you out. Remember this is for PSP-1000 and PSP-2000 (V1 and V2) only. The 5.03 HEN-A will be updated soon for everyone else.

Official Changelog:

• All features previously in 5.50 GEN-B are now available.
• You can now run OFW 5.51+ games without having to patch the UMD or ISO.
• You can now run PSN demos requiring OFW 5.51+ without having to patch them.
• You can now connect to the PlayStation store by using the MediaGo software.
• You can use XGEN updater to install OFW 6.10 (and use PANDORA XGEN to return to 5.50 GEN-D).
• 480 x 272 videos play again.

Update: There seems to be some confusion in the community, relating to your PSP’s post-installation state. You must format flash1 after the update is complete, otherwise you will be operating under somebody else’s settings. You can do this by entering the recovery menu (hold R-Trigger on boot-up), selecting ‘Advanced’ and then selecting ‘Format flash1 and reset settings’.

Update 2: GEN D2 was released a few days ago (sorry for being late!). This update fixes the CFW check for Evangelion, fixes the WLAN TKIP bug in certain games, fixes video output with OFW 5.55+ games, and fixes the recovery menu problems some users were reporting with Pandora. You must be on 5.50 GEN-D before updating to GEN-D2.

[via pspgen]

Although CFW 5.50 GEN-C was just released, it seemed to have caused more problems than Team GEN anticipated. Because of this Yoshihiro and GEN are working together to resolve the issues, and they hope to have CFW 5.50 GEN-D available for download soon. Most of the problems users are having involve decrypting the newer games, and that is what is being focues on with the next release. There are however, two common issues you may come across that can be solved on your own:

Update: The update has been released, download it here.

[Via pspgen]

A list of compatible games is being handled over at GBAtemp.

Download: Yoshihiro’s Game Decrypter v4

From the README:

hi guyz this tool is here for let you use your original game backup
on CFW 5.50 gen B-2 and 5.03GEn.

Enjoy it Yoshihiro

The best place to find a list of compatable games is still over at GBAtemp.

Download: Yoshihiro’s Game Decrypter v3

From the README:

hi guyz this tool is here for let you use your original game backup
on CFW 5.50 gen B-2 and 5.03GEn.

Enjoy it Yoshihiro

Keep your eyes on that list of compatible games being maintained at GBAtemp to make sure your game is compatible, and how to get it working if it isn’t. If you need help getting the program to work, there is a nice tutorial on our previous post.

Download: Yoshihiro’s Game Decrypter v2

From the README:

hi guyz this tool is here for let you use your original game backup
on CFW 5.50 gen B-2 .

how i can use this tool ?
1 :lets go first you need to install the GameZDecryptZ folder in your X:PSP/GAME folder
2 : Open you iso with UMDGEN 4
3 : Go to File>File List>Export
4 : Save it as Filelist.txt
5 : Extract the EBOOT.BIN with UMDGEN4 in PSP_GAME/SYSDIR
6 : put your EBOOT.BIN extracted from UMDGEN PSP_GAME/SYSDIR and put it on root of your memory stick
7 : now you can boot game decrypter now you can press X 5 seconds later it's done
8 : connect your usb cable check on root of your memory stick you have a new folder called decryptor
9 : copy the eboot.bin from the decryptor folder inside umdgen
10 : Go to File>File List>Import
11 : Choose Filelist.txt
12 : Select YES to forcing LBAs, then Save
13 : REbuild your ISO.

Voilà

Fix: testingtool support for Marvel ultimate alliance 2

Enjoy it Yoshihiro

Update: Fixed link to compatible games list, found a better one.

Some of the bigger titles that work include Gran Turismo, Persona, Disgaea 2, and Soul Calibur Broken Destiny.

Forum members at GBAtemp are maintaining a list of compatible and incompatible games.

Here are the tools you are going to need:
Download: Yoshihiro’s Game Decrypter
Download: UMDGen v4.00

Update: GBAtemp member Absynthe was kind enough to allow us to post his detailed instructions for getting Yoshihiro’s Game Decrypter to play nicely with your PSP. Here they are, with a few revisions from AnalogMan (steps 14-17):

1. Download Yoshihiro’s Decrypter (http://www.pspgen.com/game-decripter-by-yoshihiro-pack-rtu-telechargement-190007.html, you need to be registered to download).
2. Unrar it.
3. Copy the files in the PSP/GAME/ folder.
4. Pick a ISO file.
5. Download UMDGEN (http://www.pspgen.com/divers/telecharger-145702.html).
6. Open your ISO with UMDGEN and browse to PSP_GAME/SYSDIR.
7. Right click EBOOT.BIN.
8. Extract it somewhere.
9. Copy it to the root of your memory stick.
10. Unplug the PSP and load Yoshihiro’s Decrypter.
11. Press X and wait a few seconds.
12. When the PSP has restarted, re-plug the USB cable and connect it to your PC.
13. In your memory stick root, there should be a new folder called “DECRYPTOR”, and inside of it there should be a file called EBOOT.BIN. Take it and copy it somewhere safe. Do not mix it with the EBOOT.BIN you previously extracted from the ISO.
14. Open UMDGEN again, load again your ISO, go to File->Filelist->Export, type “Filelist”, and save it somewhere.
15. Go to PSP_GAME/SYSDIR, right-click EBOOT.BIN and select delete.
16. Right-click somewhere in the SYSDIR folder and choose Add -> Existing File(s)…, and browse to the EBOOT.BIN you found in the DECRYPTOR folder.
17. Now go again to File->Filelist, and this time select Import. Choose the Filelist you previously exported, and click “Yes”.
18. Click the “Save” button in the toolbar, select “Uncompressed (*.iso)”, name it and wait a few minutes.
19. Copy the newly-created .iso file into the ISO folder of your PSP.
20. Unplug and start it. It should work. If it doesn’t, try updating your custom firmware and/or changing drivers (this can be done by pressing select and by scrolling to the “UMD ISO MODE” voice. If the menu doesn’t show up, power off your PSP, keep the R trigger pressed and power it on again. A recovery menu should appear. Go to Configuration, and look for the voice “Use VshMenu”. Change its parameter to “VSHMENU”, then go back and reboot the PSP. Now the menu should appear. Try changing the drivers, it may work. If it doesn’t, just pray that someone smarter than us comes up with a solution).

Thanks guys!

From the README:

hi guyz this tool is here for let you use your original game backup
on CFW 5.50 gen B-2 .

how i can use this tool ?
1 :lets go first you need to install the GameZDecryptZ folder in your X:PSP/GAME folder
2 : put your EBOOT.BIN extracted from UMDGEN PSP_GAME/SYSDIR and put it on root of your memory stick
3 : now you can boot game decrypter now you can press X 5 seconds later it's done
4 : connect your usb cable check on root of your memory stick you have a new folder called decryptor
5 : copy the eboot.bin from the decryptor folder inside umdgen and rebuild your iso

Voilà

Enjoy it Yoshihiro

PS : not all games working because some games use some fact header on prx files

Update: Fixed link to compatible games list, found a better one.