PSP Developer neur0n just released two new versions of his Custom Firmwares.
6.35 Custom Beta v15 & 6.37 ME-4 with PSX Support released!
Only for PSP 2000 with Datacode 8B or lower!
Download: 6.35 Custom v15v4/v15
-- Converted PS1 support.
-- Supports the categorization in the iso folder with GCL.
Download: 6.37 ME-4