PRXdecrypter can decrypt/decompress/extract:
firmware modules from official firmwares (up to 6.20)
updater modules from official updaters, including obfuscated ones
official updater DATA.PSP
reboot.bin and reboot_02g.bin from all retail firmwares
EBOOT.BIN and modules from all retail games (up to 6.20), and non-retail/testing EBOOT.BIN files
M33 custom firmware modules
RLZ files
KL4E files
meimg.img and me_sdimg.img
demos and game sharing DATA.PSP files
index.dat
1SEG.PBP
Changelog:
New EBOOT.BIN key added - fixes "tag error 0x2E5E10F0"
Can extract nand_updater+lfatfs_updater from old (not 6.00+) updater DATA.PSP again