I ordered a Gran Turismo Racing Pack PS3 but it hasn't arrived yet but I'm sure it will have, at least, firmware 3.41, 3,42 or 3.50. I've been googling for downgrade guides for days but I couldn't find what I wanted to know. Nobody actually explains if you can downgrade below the FW the comes with the system. It seems the lower people want to go is 3.41 so everyone settles with that. Well, I want to install 3.15 to have Linux support. I know there are CFW and the fact that a lot of games don't run under 3.15 but I don't care so please, don't reply saying "install a CFW" or "what did you buy a PS3 for then?". Like I said, all I need to know is if I can downgrade from a factory higher FW (3.41, 3,42, 3.50 or whatever FW the PS3 comes with) to a lower one (like 3.15). I know this can't be done on the PSP or it will brick but I don't know if the same happens on the PS3. Thanks.