Rahim-US has been on a mission to create the best all-in-one custom firmware for PSP; and he might have done it with this download. In addition to supporting 1.50 kernel playback with leda, and awesome ISO compatibility with Inferno, this firmware also has a NoDRM engine too. With it, you can play PSP game DLC regardless of what PSN account the content is registered to. Bug fixes have also been applied to increase compatibility with a few troublesome ISOs. Included in this download are updated ME and LME custom firmwares for 6.20, 6.39, and 6.60. LME is to be used on PSP-3000 and GO, while PSP-1000 and PSP-2000 have the benefit of flashing regular ME. 6.20 LME is generally recommended for newer systems because the firmware can be permanent patched much like the 1000s and 2000s. That patch is also included. Check out the full changelog below!

Changelog:

- Fixed 'hide Custom Firmware dirs' function for the game Evangelion Jo

Update: If you downloaded these files prior to July 9th, please download again. A critical savegame bug has been addressed.

This pack includes:
- 6.20 LME-2.2 [PSP-3000 and GO] (reccomended for newer systems)
- 6.20 ME-2.2 [PSP-1000 and PSP-2000]
- 6.20 ME-2.2 [PSP-1000 and PSP-2000] {OFW Installer}
- 6.39 LME-10.2 [PSP-3000 and GO]
- 6.39 ME-10.2 [PSP-1000 and PSP-2000]
- 6.39 ME-10.2 [PSP-1000 and PSP-2000] {OFW Installer}
- 6.60 LME-2.2 [PSP-3000 and GO]
- 6.60 ME-2.2 [PSP-1000 and PSP-2000] (reccomended for older systems)
- 6.60 ME-2.2 [PSP-1000 and PSP-2000] {OFW Installer}

Source