This is the DumpTruck release of Ultimate Marvel VS Capcom 3 with a 3.55 Fix for CFW users. So if you already have the DumpTruck release, just extract those files and rename the directory as needed.
To play the game on your PS3 :
Go to Multiman or your backup manager and copy the BLUS30787 directory inside the "games" folder of your PS3 hard drive.
Then go to the "fix" directory and copy the package file found inside into your flash drive's root directory and install it using the "Install Packages" option on your CFW PS3. (Or DEX, whichever is applicable.)