would just like to add on this tread.
i followed the guide to the letter and everything worked fine for me and would also like to thank everyone who put a little effort into this guide, its the easiest an most informative guide there is.
everytime i have see someone relating to a brick on here its to do with user error not the guide!
checking you dump is vital! trying to write to your flash without doing this first is daft! not installing your hardware flasher correctly is not a guide fault and is user error, you would have known this if you got a bad dump!
before doing anything regarding my downgrade, i read both this guide over and over a few times and read the wiki, could find no difference at all just found this guide laid out better due to the amount of images provided in a nice step by step guide.
so to conclude, if you have a brick... did you check everything and i mean everything? did you have someone else check everything for you (something that the guide suggests and some of the very clever users in this forum do to reduce bricks).
have you then followed all the correct software steps after flashing? (even daft things like ensuring there is no disk in the drive when installing new firmware).
come on people stop hating this guide and contribute to it and make it a little more clear, after all there are so many version of flashers and console models its impossible to have a guide that covers everything perfect, but its dam close!!