BwE has made an automator for setting up files needed for downgrading.
The simple script is placed on your USB and when run (in Windows) it gives you options to load Lv2Diag.self files, FSM .PUP's, Recovery Mode .PUPs as well as the copy and management of bkpps3.bin files for clients. The script also has md5 checking and other fail-safes.
The package itself is a 700+mb pack with everything, but that is yet to be uploaded. However, a version without the firmware files is available here: http://netload.in/dateiZg3v0p7OKk/Do...omator.rar.htm and can still be used.