Originally posted by Urban128
what i need help with is, if i can just upgrade to Rebug DREX 4.30.2? from ps3ita 4.21 DEX?
It confuses me since its rebug "DREX" and not "DEX", thats what gets me scared
Yes it's perfectly safe to install D-REX on top of any DEX CFW. All REX and D-REX CFWs contain both CEX and DEX kernels, the only difference is that REX installs in CEX mode by default so it is installable on top of CEX CFWs and D-REX installs in DEX mode by default so it's installable on top of DEX CFWs.
Now the problem is that D-REX might not install on top of ps3ita's DEX CFW in particular, some users have tried and it failed to install. So just try it, it will either install or not install, no harm will be done to ur ps3.
If it doesn't install, u'll have to downgrade to 3.55 DEX and then install D-REX.