I do not recommend to try it without a flasher installed and a dump of the flash.
To quote, roughly translated: Hi all, What better than to come back with this kind of news! Our friend and SGK developer releases today the result of hard work. Indeed, in the shadow he worked to bring us a CFW with features interesting and not yet seen the new CFW 4.xx
The basis of this CFW is based on Rogero 4.30 and the 4.21 Rebug CFW which is the most stable and most successful of the moment. He added SGKXMBM + Package Manager for our greatest pleasure. Some files from firmware 4.31 which ensures compatibility for the latest keysets. So you can play your backups favorites without a patch or fix. 4.31 is a spoof includes access to PSN and avoid unintended updates.
Added package SGKXMBM +
Lv1 Lv2 and recompiled.
Patched Peek & POKE
Coldboot game replaced
Theme changed from dynamic watch dogs
Testers and developers: consolehackdev / ZZ / dedalo! Teamsgk/ps3devs; SGK_84
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1: Patch enabled Cinavia
2: Compatible with Rebug toolbox or tool CEX DEX I edit
3: Setting the Debug menu CEX DEX via toolbox and available
4: Rebug mode via the toolbox and is available mode is used ReactPSN
5: Fake save data owner DEX functional setting
6: Adding trophies in the category syncronize user to be able more easily
To enabled debug menu setting on the XMB has gone parameter networks and then made (R1 R2 L1 L2 L3 DOWN TO BELIEVE DIRECTIONAL)
0: Installable on all CFW 3.55 4.21 4.30 and 4.31v3.2, 4.0, 4.1, 4.2,5.0,5.1,5.2
1: Have QA flag enabled and system update debug ON
2: Copy the PUP in your USB in PS3/UPDATE
3: From the XMB (cfw4.31-cfw4.30-cfw421-cfw3.55)
4: Update system
5: Update from super storage
Hello. i have installed 4.31.7 by team sgk... its very weird i cant get a thing in it... is there anyway i can make it look normal (no dragonballz no booting up and text in english)... or update to rogero cfw... plz reply ASAP.