I sent an email to: "dumpcheck @ hotmail .co.uk"
with this subject: "zeruel85 - ps3 nand dumps check".
I didn't follow only one guide, but I verified my nand dumps with these steps:
1)
http://www.ps3devwiki.com/wiki/Validating_flash_dumps
2)
http://www.ps3hax.net/showthread.php?t=39766
I think they are good, but I wanna know your opinion too, thanks a lot.