Step 1: Select the proper firmware for your console that you need to download. If your running CEX base CFW click the CEX Link and for DEX Base users (DemoCFW) click the DEX Link.
Step 2: Plug a flash drive into your PC/Mac and on the USB Root create a folder called PS3
Step 3: On your USB flash drive inside the PS3 folder create another folder called UPDATE.
Step 4: Place your downloaded file into this UPDATE folder and rename the file PS3UPDAT.PUP
Step 5: Remove your Flash drive from your PC/Mac and plug it into your CEX/DEX Base CFW PS3 and scroll to system update on your XMB
Step 5: Select the Update and let it install.
NOTE: The CEX Base can be installed over any CFW. Also if you don't have MultiMan 4.80 or higher you will need to update!!
And thats it your done installing CFW REBUG 4.80.1 DEX/CEX on your PS3
REBUG Toolbox 2.02:
New Update used to activate internal Cobra driver for CEX/DEX Base users. Just scroll to Package Manager and Install New Package files and select REBUG Toolbox 2.02 and install new or over the older version.
REBUG Toolbox 2.02: http://www.mediafire.com/file/q4f1ncaho5oo1hc/REBUG_TOOLBOX_FULL_02.02.10.pkg