Mathieulh Wrote:

• Install the pandora firmware to the memory stick using the normal procedure.
  
• Copy the files created on the memory stick somewhere on your computer
  
• save your flash1 registry folder into your memory stick root
  
• Extract 1.50 from a psar using psardumper.
  extract it as encrypted and then once more as decrypted (save both dumps)
  
• Copy the encrypted dump folders to the root of the MS, and get pspbtcnf.txt pspbtcnf_game.txt and pspbtcnf_updater.txt from the decrypted dump, and use those to replace the ones from the encrypted dump located at ms0:/kd/
  
• Get the flashemu.prx and lfatfs_patched.prx from the pandora MS files you saved earlier (they are in the kd folder) and copy those into ms0:/kd/
  
• open ms0:/kd/pspbtcnf.txt and ms0:/kd/pspbtcnf_game.txt and ms0:/kd/pspbtcnf_updater.txt files using a text editor and :
  
• change /kd/lfatfs.prx to /kd/lfatfs_patched.prx
  
• add /kd/flashemu.prx right after the /kd/fatmsmod.prx line.
  
• save the files

Done, the 1.50 firware will boot straight from the MS using the pandora battery. Of course you may adapt this mod to another firmware such as M33.