It seems many people are having issues when they are trying to boot their games with SS (Security Sector) files that they have downloaded.

I think we may have spotted the problem. let's take an example - Call of Duty 2

We checked every single version of the ss.bin for COD2 NTSC/U and each and every one has the same MD5 884E8BA44329D133973289A0CD8C8374. However when checking the PAL version we found 3 different versions (so far !)

DF77CCA54F575225DF6C07DF459A8652
510A6C63D95CB26B072D5C214D207DC8
2F66E72B3E3A2895AB883628749C778B

So our guess is that their are different versions of game for PAL countries (Probably UK, Euro/Multi language & Australia).

This would definatley explain why many PAL users are having issues. Someone needs to start a database of which ss goes with which iso - best to have MD5's of both so it helps people from tearing their hair out and wasting money on expensive dual layer discs.

Source