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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Pinoy, this is 4.30 spoofed to 4.31, just like Rogero's. Rebug won't make 4.31 CFW, there is no reason to.
fantapoulos, treat devs better, there is a big chance you're the one who messed up. Lot's of times people install faulty PUPs and that ends up giving people bricks, the one to blame on that case would be your internet connection. This happened to Rogero CFW too btw, too many people downloading from the same link.
Btw, why gaming was not meant for cheats? Cheats can get you custom characters on super smash brawl and you can edit quite a bit of things on different games, It's fun.