Ok I'm getting some clarity here, and learning - thanks
So, the idea of the MinVerChk is to check the original OFW version that shipped with the box. So when I downgrade before CFW, I can't take it below the original version, hence the reason why I want to make sure I can take it to 3.56. Gotcha!
Can someone clarify then exactly how to use the MinVerChk then?
I've got the PS3UPDAT.PUP file and the Readme (which isn't helping much), so if someone could walk me through the steps I'd appreciate it.