You are looking for cracking information. I recommend u to search other place, cause CDFreaks can not help u this topic. Encryption place, decrypting and launching of several encryption rings (at code level) is a Macrovision industrial secret, so then, think why u cannot obtain reply here.
What we can tell to u is SD 3 have "ramdom" weak sectors that, in some way, are read to codify a key. This key is compared by a software disc one, and if matched, then launchs decrypting process.
I cannot help u anymore.