Your best bet would be to build your own cfw with mfw builder as it allows you to customize your features and can do all you are asking. Don't think you can remove the debug feature and without the install function homebrew would not be able to be installed to use it then. Even then most of the features you want removed come standard in even an original DEX firmware so I don't even know if it is entirely possible to do what you ask.
Last edited by atreyu187; 03-31-2013 at 03:54 PM.
PS3 CECH-2501A [CFW] & CECH-3001 [OFW]/ PS2 SCPH-3901 & SCPH-7501/ PS1 SCPH-5501
Mod Cobra 4.46 v7.00 w/ E3 Flasher [CFW] & Cobra ODE 4.50 [OFW]/ Mod HDD-OSD [Phat] & Modbo 4.0 [Slim]/ Mod MM3
HDD 1tb [CFW] & 640gb [OFW]/ HDD 640gb & OPL v0.92 w/ 1.5tb SMB