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!
Make sure this get front page on this site
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By "after jailbreak", you mean after installing a 3.15 MFW? Currently i use my ipod to jailbreak my OFW 3.15 each time, and the idea of installing the MFW is so that i don't have to use that jailbreak method anymore and still keep my OtherOS.
I assume then i could revert back down to lower OFW without a flasher for any higher MFW /CFW, but what method exactly? Just an update.pup on USB drive in Service Mode, or do i need a special downgrader pkg?
Also, think i've read some about QA flagging in the past, but not sure when it's required. Even with all the reading i've done on here, you can see why i'm hesistant to try MFW upgrade... lol .. need to read or re-read a bunch more old posts to see what i can figure out for sure.
Wish I had a flasher and more knowledge to test mfw. I patched OFW 3.15 to MFW 3.15 for my 60gb phat with MFWbuilder a while back, but have been too scared to try and install it in case I couldn't revert back to my OFW without a flasher. (think i should be able to, but wont risk if not 100% sure)