Please source properly, the following came from http://psgroove.com/content.php?401-...rade-File-Leak
"Here is the leaked file for the psdowngrade with setup instructions and how to use it. The files used to flash the PSDowngrade and its readme have also leaked! These files are for a specific person's dongle. So there is no reason for the average user to try and flash them. However, they may be reversed, which would lead to a free method of downgrading.
The readme references files such as lv2diag.self and a modified 3.41 pup file. For those of you that don't know, lv2diag.self is the name of a file used in conjunction with Sony's official Service Jig. It seems the jailbreak team has reverse engineered that jig, this time around."