This way you will not have to rely on commercial CFW which may contain hidden DRM / ReDRM schemes nor will you have to download 170+ MB files unnecessarily... you can simply make your own PS3 4.25 Modified Firmware with whichever options you choose to include!
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You can see if this 4.25 basic MFW install on 3.55 so far i have never tired the MFW 4.25 and ON XMB MANAGER you will have to find one, if you install also i don't know if it will DOWNGRADE or even install. It takes a lot of work and then would not install or even look at the file on 4.10.
PS3 MFW Builder is quite useless unless you need a SEX2CEX reverter. Otherwise its useless.
Just to let users know: THIS WILL NOT BUILD AN INSTALLABLE PUP FOR OFW 3.56+ !!
I just thought you guys should know that before you spend countless hours trying to do the impossible with a program that does basically nothing. All the real developing is within YOU! Not the program. Be creative. Create an original CFW for 3.55 without this program. Hey, you'll learn in the process