I'm pretty new to the PS3 modding scene, however have been modding Xbox360 consoles for a while.
I'm trying to downgrade my second PS3 Slim. SECH 2002. I have a progskeet with the 360Clip 56 for NOR. As well as the 48 for the Xbox's
I have read the NOR, patched it. Then checked with a hex editor it was patched. Flashed it onto the console, and had problems verifying, but read and checked it again, looks good.
However I can't get it into service mode with my PS3Key set to downgrade. (tested this on my 60GB PS3 on CFW and works fine)